For Mossberg 500/590 the only buttstock I LOVE is the Magpul SGA. It does away with the ridiculous LOP, rock hard buttpad, horrendous reach to the trigger and crappy cheek weld. The OE buttstock is the bane of Mossberg shotguns for me. I did try the very cheap ATI pistol grip buttstock, similar looking to the speedfeed 4, and found it very comfortable on a 20" Maverick. The crossbolt safety on the 88 made safety manipulation easy with that stock. I did have to rotate my hand a bit to hit the slide release but thats not a big deal to me. Unfortunately it too had a horrendous LOP and hockey puck for a recoil pad that ATI touted as some sort of recoil system. At any rate the cheek weld was great with a bead sighted 20" and cheek slap was non existent. My current 14" 590A1 is kitted with an SGA buttstock and Surefire DSF. With GRS, it's the Cadillac of pump shotguns for me.