I'm new to the Bluedio Faith series but definitely NOT new to Bluedio. I've owned the Victory, UFO, UFO Plus, Turbine 2s, Turbine 4, Air (A1), and Air Earbuds (AI) series and I can, without a doubt, say these are the new standard for affordable wireless headphones. These take the crown away from the Air (A1) when it comes to "best bang for the buck." While the A1 and F2 are extremely similar in function, vast strides have been made when it comes to chassis materials and features. Please see my review of the Bluedio A (Air) Stylish Wireless Bluetooth Headphones with Mic (Black) for all of the basics, as the internals of these two headphones are very similar. This review will mostly go over the changes and improvements made.Bluetooth: As with all of the Bluedio headphones, the Faith series pairs effortlessly. The set uses BT 4.2 now, which is an upgrade, but I really wish they would of waited a month to release and implemented BT 5.0. Connection range stays around 40 feet, where it could be vastly improved if 5.0 had been implemented. Walls and floors still degrade range, but do not seem to affect max range as much as the A1 was affected.Chassis/Materials/Build Quality: While I think the Air series still wins on quirky style, the Faith series is now the gold standard on inexpensive "quality." The chassis is now made of far more premium materials than the old A1 series. Where there was shiny plastic and chrome, there is now aluminum and a harder matte poly. Does that mean these are tougher than the old A1? Probably not, the A1s were beaten to death over the last year and show almost no wear. But the Faith series "looks" like a $200 set of headphones, while the A1s do not. Another feature that is new to the budget Bluedio is the ability for the ear cups to rotate flat instead of flipping/folding up (reference pictures). This is important because the headphones now take up much less room in their semi-hard case in a backpack than the A1. It makes them even better for plane trips!Battery: Sadly, this is one area where two steps have been made... backward. It is possible that battery life is affected by the inclusion of ANC. Or it is possible that battery size needed to be reduced in order to fit the ANC tech. Either way, rated battery life has been reduced from 20 hours to "about 16" and realistic max times have dropped from 30 hours (A1) to around 24 (F2). One of the best things about the A1 series was its ability to outlast just about any other budget headphone, and that has not changed. The A1 easily outlasts the F2 in battery life.Sound Quality: While the Faith series still uses the same single 57mm driver in each cup, there is one area that has improved immensely over the A1. The Faith series now has ANC (Active Noise Cancellation). The technology makes plane trips so much better than using the A1. Where the A1 relied on volume to block out aircraft or background white noise, the Faith uses an active noise-canceling tech to effectively reduce background white noise. This tech is not the same as "shooting/sport" headphones like Howard Leight by Honeywell Impact Sport Sound Amplification Electronic Shooting Earmuff, Classic Green (R-01526) and as such, should not be used for shooting events or something similar. The only downside to ANC, from experience, is that it tends to wash out highs and lows, sometimes badly. The Faith, thankfully, does not suffer from this problem much, but it IS present. It is recommended to not use ANC unless you need it, such as on a plane. With ANC turned off, the sound quality is similar, if not slightly improved, over other Bluedio 57mm headphones like the A1, T2, and T4. With ANC off, bass and treble are both fairly impressive. With ANC on, both highs and lows are slightly muted in favor of a more flat reproduction, but with the tradeoff of a more "isolated" listening environment.Accessories: The Faith series continues upon Bluedios efforts to impress in the packaging and accessories department. The Faith series uses USB-C, arguably a vast improvement over the Micro USB used in the A1 and similar headphones. A USB-C to USB-A cable and USB-C to 3.5mm cable are included. The semi-hard case is flat black with red trim, functional and stylish. There is a small zip up soft case for the cables.In summary, the F2 makes great improvements over the other Bluedio budget series, the Air and Turbine. Are they the perfect headphones? No, not even close. But they are just about the definition of the perfect "Budget" travel headphone. I get asked by at least one Bose QuietComfort owner per month (I travel a lot!) what headphones I'm using, and I generally let them try them to compare the two. Having tried both myself, I really can't tell a significant difference (definitely not a 150 dollar difference). And the Faith series definitely holds it's own in a style showdown with the popular Bose headphones as well.Depending on your budget, your sound quality desires, your style preferences, and how much weight you find comfortable, a buyer has 4(or 5) good Bluedio choices:30-50 Dollars: Bluedio A (Air) Stylish Wireless Bluetooth Headphones with Mic (Black)60-70 Dollars: This product, the Faith F2 series80-90 Dollars: Bluedio U (UFO) PPS 8 Drivers Over-ear Bluetooth Wireless Headphone with Mic(Black)130-180 Dollars:Bluedio U Plus (UFO) Pro Extra Bass Wireless Bluetooth PPS12 Drivers Over-Ear DJ Headphones (Black) OR Bluedio V (Victory) Pro Patented PPS12 Drivers Wireless Bluetooth headphones (Black)The more expensive models, like the Victory or UFO U Plus, are much heavier than the more inexpensive models, mostly because of added drivers. But, the sound quality is immensely improved over the cheaper, 57mm driver models like the Air or Faith series.