We had a thread on the Gazelle in Buyer Beware last week (at least I THINK it was in Buyer Beware).
Since I've never used the Gazelle (I'm a gym rat...plus our apt is itty bitty and what space we have is taken up by hubby's music studio

) I'm not going to *directly* comment on its useability...but I am going to say (and this goes for ANY piece of exercise equipment - especially one that takes up as much space and goes for such a high price tag as this one) that IMO everyone is going to have a different experience. Please, please, please...TRY BEFORE YOU BUY. Go to Sears, KMart, WalMart, whereever they have them on sale...wear some appropriate shoes and perhaps some yoga pants - something you can MOVE in...and spend as much time as you can trying it out, the different resistance levels, all the features.
Then - if you still want it and feel it's a worthwhile investment - I suggest you go on Craigslist.org or a similar classifieds site and find one that someone is trying to get rid of. As Jenn's experience points out, you can find a LOT of "as seen on TV" exercise gadgets being sold by people who bought them with lots of enthusiasm, used them for a very short time (or maybe didn't even bother taking them out of the box!) and then they gradually became clothes hangers.
My best suggestion for 'at home exercise equipment' would be to get a good outdoor bicycle (doesn't really matter which type - road, mountain, hybrid...whatever is most comfortable for you) and a WIND TRAINER (preferably a quiet one!) from a cyclery (bike shop)...during inclement weather you can attach the bike to the wind trainer and cycle indoors in front of the TV...and during the warm summer months just use the bike 'the regular way' and get some fresh air outdoors.