I am posting this in reference to my previous post: http://tt.tennis-warehouse.com/viewtopic.php?t=2575 With only ~ $400 budget, I went ahead and gave Mutual Power a try. I ordered the Alpine 2000. It's a spring tension machine. I have nothing but good things to say about this product. It's affordable, very sturdy. No frills. I will never go back to swivel clamps again. Single action clamps are just so easy. I am recommending this to any of you with a modest budget. I also had a nightmare experience before with Eagnas, and my experience so far with MP is totally different. I do have a feeling that MP is a family-ran business. I don't know if that's a good thing or a bad thing. No comments yet on customer service though, since there have been no problems yet. But they did give me their home phone number if I had questions over the weekend. That's 1 point for their service.