I'm just curious what other players use and how things work out for them. For my part, I only use them in certain areas where I want to loot resources and don't feel like manually dragging/dropping hard-to-grab objects (feathers for instance) 10,000 times. I alternate between Trailmyx's Advanced Claw Full and xparrs smart looter. There are things I like and dislike about each. I find xparr to be MUCH faster but I can't figure out how to add any new items to the lootable list. So when I want to loot something that isn't in the list (organics, for example) it's useless to me. I also have no idea how to, or if it's even possible to, get it to loot armor + weapons by properties, instead of looting every halberd it comes across.
It's easy for me to add new items to the loot list in Trailmyx so I use it for specialty stuff like orgs and driftwood, but it is SO slow that it's only useful with very short looting lists. I can manually evaluate item properties as fast as this looter can. Also as far as I can tell there's no way to get it to cut up hides into leather.
I've heard that UOSteam and AssistUO both have great and stable autolooters but neither will run on my notebook. I'm interested in hearing about what else is out there though, or if anyone knows more about xparr and Trailmyx than I do.