PROS-very well made and very robust-massive suction cup with very strong holding power-easy to attach suction cup: very smooth surface (e.g. glass), make sure it’s clean, position suction cup, evacuate air with pump-mounting area of suction cup has multiple bolt holes (mostly 1/4”-20, but 3/8” too), several of which have Arri locating pin holes-good quality magic arm, both ends have a 1/4”-20 bolt with locking pins (it’ll easily hold an actioncam or a mirrorless camera, I’d put a more substantial ball head on to hold a bigger camera)-useful actioncam fingers and mobile phone bracket included-arca-swiss dovetail on the mount (not sure how I’d use this, perhaps mount this unit to a tripod and use the suction cup to hold some glass?)-at £49.99 at the time of this review, I consider this good valueCONS-protective cover of suction cup a flimsy plasticNOTES-I have two much smaller suction-cup rigs, suitable for actioncam and smaller mirrorless cameras. This one would certainly hold a much larger camera (as long as the surface is suitable, glass is best).-would’ve been nice for this to come with a case (if you get dust/lint on the silicone of the suction cup, it won’t hold as well)MY STAR RATINGS:1* substandard, mostly cons2** barely acceptable, cons outweigh the pros3*** meets the basic requirements, cons balance the pros4**** good product, pros outweigh the cons5***** exceptional, all (or almost all) pros