No, but I (infrequently) play in one. It's Dark Sun d20. . . so, strictly speaking, there is arcane magic, but PCs are a rather wary of using it, and the DM hardly encourages its practise. No PC has bothered with it at this stage. Also, divine magic is a bit 'odd', and not exactly omnipresent either.
As to how it's turning out: good! Loads of fun. If it's any indication of how 3e psionics works as the main form of 'magic', I'd say 'excellent' would be a fair assessment.