Chris - I shoot GT 5575 XT's just to beat around in the yard... They're tough as nails, good arrows - they shoot good, fairly indestructible.

My only gripe is the spine. I have no basis to say they're "flimsy" - other than comparing them to my speed pro's - but they just feel like a wet noodle to me. And a little on the fat side.

For the price (ebay), they're awesome, but I'm sure you could get better efficiency numbersor penetration out of one of the more spendy alternatives.