I have an Alpha machine I purchased from TW over three years ago. The center screw on one of the clamps locking levers snapped while locking it down Thursday morning rendering the machine useless. Its now Friday and I'm back up and running thanks to Greg at New Tech Tennis. He sent out the part at no charge and would have shipped it ground at no charge, even though I didn't purchase the machine from them. I did pay for overnignt freight and was happy too. This kind of service is like a breath of fresh air and completely unexpected. I now know where I'll purchase my next Alpha machine and I would highly reccomend Greg and the crew at New Tech Tennis to others.