TweetWell, the Gazell is totaly crap. IMO, the bike is the only thing that best represents it's realy life counter part. Treadmills are moving belts, which are not the same as the body actually running against gravity. Elipticals are a little more realistic than teh treadmill to some degree, but to get a good one of those you better be ready to dump atleast $2,500 into it. There is no point in getting something that is crap because it will just eventually break and it will do it much sooner than a good one. If you want a good workout, then by an actually bicycle and one of those roller things so you can ride indoors. This way you can change the speeds on the bike to simulate hills and such and that would be the cheapest way to go.
Remember, you get what you pay for. Unless you can find someone selling a used piece of good quality equipment, I wouldn't waste my time. I would buy a 5 year old Precor Eliptical before I bought a brand new piece of crap one. You get it used, you have it serviced and it will last you a long time, it you get a good quality one.