Hi there--
I got mine about 4 years ago and love it. They are great for a low impact day. I do alot of Cathe's tapes and run as well. But I always try to get one elliptical workout in per week. I like to do it when my legs are feeling pretty maxed from a run, step, or a grueling weight workout.
One thing I would caution you on is to "try before you buy." Some of them will feel more comfortable in their range of motion than others for you.
I have a Vision Quest and the range of motion isn't as great as some of the others I have tried in gyms. It feels more like a stepper. Its fine for me, but there is that to consider.
Overall,it is a great cardio workout IMHO.
Good luck!
Lynn