i use elixirs on my geddy and my highway one P. man, i just love them to death. they last forever, don't sound too 'zingy' when new, they just keep a nice consistent feel for a long time. i had a set on my geddy for a whole year before i changed them, and they probably didn't even need changed. i was just going through a spell where i was unhappy with my tone and was changing all sorts of stuff around, picked up a mess of different strings i'd read about on here, tested them out... put another set of elixirs on and it felt like home.
they came on an ibanez SR505 that i bought last year, and i liked the feel, so i tried them on the geddy. the project i was using the ibby for i used a pick most of the time and the pick tore the coating up on the B real good and real quick, so that is something to think about before sticking a set of relatively expensive strings on a bass. if you play with a pick, that coating might fray on you.
i love elixirs. i love the way the coating feels, i love space age technology in a bass string. they don't seem to be all that popular on here but i am a fan.