I can only say good things about this gel pad. After 3 weeks of use, it presents itself as a great add-on out to my non-ergonomic Logitech keyboard. Quality seems fine to me. The surface is soft and comfortable to the touch and to use well in the warm summer safely. (With pure rubber / gel surface I did not a good experience). Price / performance is very good. I would recommend buying - but have no comparison. Basically can not be much wrong with a gel pad, right?
10 minutes later: Funnily chance. Hardly written evaluation, this thing bursts open easily and sticky gel swells out. As it would have been waiting for. Price / performance = crap.