Everyone moans about West Ham but I thoroughly enjoy it. Hackney Wick is a great place for a beer, it has numerous transport links and most importantly I guess I've never seen us lose there.
Admittedly, I'm not sure I'd do an evening game there again (last year was an effort) but Saturday at 15.00 is a decent day out.
Don't get off at Stratford and do get out at Hackney Wick is my key advice.
If you can get tickets in the lower tier I think it's a great away.
We usually start in Bethnal Green (great pubs) and make our way into Hackney Wick (through Victoria Park if the weather is decent).
I can see why some think it's shit if they go via Stratford before and after the game.