I bought this toy for my boyfriend, since I made him get rid of his old, yucky sleeve. It is very asthetic and discreet; people probably wouldn't have any idea as to what it actually was on first glance. It is light weight and cleaning is a breeze too, just as promised. Overall, he gives it a 3 1/2 in stars because:
Positives: The sample lubricant that came with was nice, enough for three or four uses. It's insertion point can accomidate the girthy gent and it is deep enough for the longer gent (we've had problems before with it just not fitting). The material is very soft and the textures inside are really cool and feel great. Easy to operate. The casing is plastic as well as the slide clip, but it's sturdy enough to last at least as long as the 50-use-warranty, probably more.
Negatives: The air release function is neat in concept, but the design is oversophistcated and creates a lot of issues. It can provide it's own suction/pressure, but sometimes this can be too strong and my boyfriend usually opts to use the air-release, or sometimes just takes the side clip off all together so he doesn't have to keep hold of the button. It's not as versitile as a sleeve when it comes to the different ways you can use it either, can't go hands free against your surface of choice. Extreme downside of the toy is that it makes all KINDS of crazy noises. With the air-release activated, it kind of sounds like a soft respirator--with it off it sounds like a duck... a really obnoxious and rasping duck. I think that's because the contraption itself can't ACTUALLY create an air-tight seal around your weiner with air-release off, and because the air escapes AND enters through the insertion, you get demented, sloppy mini plunger sounds. It can be pretty distracting and it's not at all suited for stealthy quickies. I think the sounds are so ridiculous it's comical... can't be sexy during mutual masturbation when I'm laughing myself teary.
Ofcourse, pleasure is different to us all, but the annoyances would probably be the same. Tenga should definately come down on the price for this toy by at least $25 more bucks, in my opinion, it's a little over-sophisticated and has flaws created purely by its design. We're going to be trying one of their sleeves soon, and unfortunately it may totally take the place of his Flip Air or at least get a lot more attention.

Everything Ty Jordan mentioned is true. The suction sensation is just too minimal for the amount of noise it creates. Though, I believe the amount of suction will vary depending on how well you fit it. Speaking of fit, the opening is much wider than the original/black Tenga Flip Hole. However, the original feels much better and makes much less noise. I would only recommend these Lite versions if you know for a fact you are too wide for a Flip Hole. If you fit the Flip Hole, these Lite versions are a complete downgrade.