I bought myself the s710a (on Cingular) after researching a number of phones. Seemed like the perfect phone.
I am having alot of trouble with clear reception in the same places where my old Motorola v400 worked great. Alot of dropped calls, static etc. It also downloads from the web verrrry slowly compared to my daughter's Razr. And I'm having some trouble getting used to the swivel opening. SE claims that reception is better with the phone opened (which I have noticed) but even better is not great.
I'm in the market for a new phone even tho my SE is only 2 months old.
The screen is beautiful tho and mp3s are nice and clear sounding.