The Ab Lounge ... wasn't sure what it was so took a look and I see it is distributed by Fitness Quest. I am familiar with Fitness Quest as I owned a NitroFlex which I did find useful for some exercises which allowed me to safely do stuff life Military Presses and such. I also own a Gazelle which is also sold by Fitness Quest ... which believe it or not does work.
Fitness Quest sells a lot of stuff for peoples home use but I honestly believe the majority of the stuff is sold to consumers who are looking for a "quick fix". They are sold through Infomercials, magazines and such by very aggressive marketing firms who prey upon the fat, lazy and otherwise average people. With that said I will give Fitness Quest two thumbs up for customer service. When ordering the Gazelle about 6 years ago I found it squeaked too much so I contacted them and instead of sending it back they sent me a new one. I am also currently dealing with them on the NitroFlex and parts are being supplied eventhough it is a discontinued item.
Now here's the thing. The NitroFlex and Gazelle also fit into this catagory of a "quick fix" BUT so can a home gym, or even if you buy a membership to the nearest gym. I honestly believe if you "use" the item and continue to "use" the item past the time that the average person would loose interest in it, then it "can" be useful and you "can" be successful.
I don't use the Gazelle but my wife and daughter have taken this out of storage and are starting to use it which is good. My wife walks everday and she is supplementing herself with the Gazelle. My daughter is not very active at anything with the exception of girl things so that she is doing this is good. The reason I stopped using it was at that time I was so into weight lifting only that I found I was loosing too much weight which I didn't like. The NitroFlex was purchased in 2000 to supplement my free weight workout but there is no way it could replace what I was doing but it was useful at many stages in my development. I out grew many things on it but again, I used it and stuck with it and was successful.
If you want to use it then use it ... but really "use" it. It might be the beginning of you wanting more and picking up other exercises to supplement it ... or ... it could lie in a closet collect dust. It really is up to you.
BUT I will leave you with this. The Ab Lounge, NitroFlex, Gazelle or what have you could be easily acquired through other means cheaper ... it just takes hard work. But we are a lazy society and hence why instead of cooking dozens of chickens I opt to take protein powder ... because I am lazy.
(Note: I may be lazy in this area but weight lifting and martial arts take up much of my time that sometimes I don't have any real time to just sit back and be "really" lazy.
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