Just got off the phone with Performance Products regarding the Spring Compressor. At first they were going to charge me the rental fee, I tryed to get them down to the cost of shipping it to me (about $18). In the end I ended up with a gift certificate for the value of the rental ($85.50). Of course that took talking to a manager and listening to how "the tool should have worked, it's worked for others" almost a dozen times. I'm not denying any of that, all I know is it didn't work for me.
Looking at it from their point of view I can see why they were reluctant to just refund my money. But still, the overall experience kinda soured my opinion of them.