It's a long time ago, but it killed much of the sustain/resonance and just made the guitar sound duller. I had a similar result when I put a Kahler Flyer on a Squier Strat instead of a vintage style trem - it felt better, stayed in tune better but I really don't think it sounded as good.
Just my theory, but I think the problem is the way the saddles stay put but the back of the bridge lifts up, changing the break angle so there's very little string pressure on the saddles when the pitch drops. Recessing the bridge helps, but doesn't cure the problem. Also I suspect roller saddles in general don't do much for tone, too many parts....
But hey, nowadays I like one-piece wraparound bridges and I don't like trems at all, so don't listen to me, it's your guitar!
