Some interesting posts here !
Used a Cobra multi pin for a long while, hunting in SA, and then I was introduced to single pins - I havent looked back since !
I use a HHA (0.010 pin ) guys, there is NO BETTER !
Generally shoot at 25 yds and less, and as such my slider stays on 20 yds - at these ranges, my trajectory is so flat, that the diff b/n a 15 yd shot and a 25 yd shot is no more than an inch or so.
Once you've shot a single pin, you wont want to shoot a Multi !
Just my 2 cents worth guys