I have a Travel Trac trainer. Bought it for around $200 3 years ago from
Performance Bike. I've put about 400 miles on it and it still works like new. It can be pretty loud but the smoother the surface on your bike tire, the less noise it creates.
I like how it folds up and is easy to store. It's also easy to mount/un-mount the bike from the trainer itself. I highly recommend getting a front wheel block for added stability. They run about $20.
Final note: On my trainer I had to replace the stock rear axle with one that comes with the trainer because the stock axle doesn't fit the mounting hardware. The trainer only shipped with 1 axle so I had to call Travel Trac for an extra so we can use my wife's bike as well. It was easy to get it and they didn't charge for it.