This is the fourth folding keyboard I've owned. The first, and best, was a Dell one that unfortunately only worked with my old Axim X51v - when I upgraded my PDA, it had to go. Since then, I've tried Freedom, HP and Think Outside bluetooth keyboards, and this is far & away the best one on the market. I've now used it over the last 3 years with 3 PDAs and have had no problems with any of them. Recently, it HAS started to show its age as a number of the keys have started being a little tempremental, so I've been looking to replace it. I've tried one of the roll up, smart cloth keyboards, but it was massively innaccurate for typing, whereas this one feels pretty similar to a small laptop. Sadly, Think Outside seem to have withdrawn the Stowaway keyboard, but no-one seems to have come up with a better product to replace it, so I suppose I'll limp on with my aging one as it is so much better than anything else on the market.