We're using Easton Synergy ST's exclusively for both our varsity teams this year, and we've broken under 40 sticks in 17 games with the men's team... that's 306 man games played. Comparatively we'd break 4-5 sticks per game last year when we used Sherwood RM9's and RM19's. Even though the ST's are quite a bit more expensive than what we paid the Sherwood's, we're almost 90% sure to have lowered our stick budget this year if we count the full year.
I can't remember where (probably on here somewhere) but I read that the ST is actually the direct evolution of the original Synergy's, and those were solid mofo's. Also read somwhere that the ST is actually the stick most used by NHL players, though most of them have them painted as SE19's or the like to market them for Easton.
A few of our guys have been playing with EQ50's of late though, seeing as there was a screw up at the factory and we couldn't get any left handed Parise's in ST when they changed over from Drury to Parise so the rep sold us a batch of EQ50's at our ST price and they seem nice, and we haven't broken one yet, though they've only been in play for 1-2 games.