personally I love em! call me old fashioned, but Ill raise with them preflop, unless im fairly certain someone else has a high pocket pair then Ill just call.
I guess for me its because of their implied odds (in NL). If you get a beauty of a flop - such as top two pair, a set, a strait, maybe even a fllush - then you will prolly end up taken someones stack, who slowplayed their pocket bullets.

The style I play suited connectors is that im willingly to risk about 10-15% of my stack preflop (barring exceptions such as a read on someone). If I raised preflop with them, and got nothing on the flop and have a good read on my opponent that he doesnt have much of anything then Ill raise with them again. (porbably because im an aggressive player)

I hardly ever play the one or two gapper suited connectors, though if I can limp in with em then I prolly will.

If I was playing limit, i would hardly ever play the mid to low suited connectors, but since im a definite NO LIMIT man I love em because of the implied odds im getting.