I've used (and like) the GHS Presurewounds Tom and they are somewhat similar. I just strung up my '93 A/S J with the heavier 50-105 set and played for about an hour. While switching over, I used the opportunity to coat the fret-board with Gerlitz Guitar Honey (my chosen brand - there are a few out there) which keeps it from dying out - something that should be done regularly, especially in a dry climate. I find it hard to do comparison tests with strings as each bass will be different itself, new strings always sound different and other things like amp/settings also colour the result. Having said that, I do like these strings both in feel and sound/tone. As much as I thought the old (lighter gauge) strings on it (of unknown brand) sounded good, they were in fact pretty dead compared to the lively zing of these new strings. Good chordal definition, solid bottom and w/defined but not clanky top end. I used to use GHS strings exclusively but over the last couple of years have been using D'Addario's XL's and enjoying them. So a nice new free set which woke up my J is a good thing all around. Two thimbs up? I'm taking it to rehearsal tomorrow night for a live/band test. I use a J w/Super 55's (split-coils) and LaBella flats - so it will sound very different in a few ways. (as per my 'hard to compare' comment) But regardless, testing in a live/band situiation is always a good indicator of strings worth.