I know there are better Android devices out there (Nexus One) etc. but if your on a buget this looks like a half decent deal.
what you get :
Samsung Galaxy Portal i5700 (spica)
300mins + 300txt + unlimited Internet £25pm / 18months contract
Plus £135 Auto cash back
Plus possible £25 Quidco
Total outlay (assuming all cash back pays) £290
Only major down side for me is the version of Android (1.5) although samsung have confired they will be releasing version 2.1 in Q2.