Which Cryptologic site? Are they safe?

[hunkyrabbit]

I'm looking around for some new sites to play on. Being from the UK, I've got a lot of choice [img]/images/graemlins/smile.gif[/img]

I quite like the look of the cryptologic sites + it seems I can get rake back on them.

I Just can't decide which to pick from.. Littlewoods, Inter, William hill, or Sun Poker.

Does anyone play on any of these sites? Could you say which one would be the best choice?

One thing I am worried about though is the security. I've downloaded most of them, and it seems that you can open them all simultaniously. Does this not mean that players could have different accounts at different sites and sit at the same table? Excuse my ignorance, but I've never played on a networked site before, so am a little wary.