Treo 650 (on O2?)

[polar_ben]

I'm looking at getting a Treo 650 (possibly from eBay) but I was wondering if it was as simple as plugging my mobile's sim card straight into it (I already use my mobile for email/data) or am I missing something?

Also, does anyone here have one, and if so, how do you rate it?

Cheers,
Ben

[polar_ben]

Excellent - thanks Alex.