Yeah slaving ableton to anything will mess up any LFOs and things of that nature that need an *exact* time to stay "sounding" in sync.
EDIT: slaving ableton to something also disables delay compensation - keep that in mind.
I've had some awful issues with Live 8 sending a solid midi clock to my machinedrum + monomachine. It would stay on for a few minutes, and then drift horribly all of a sudden. This drift would then be cumulative over the course of play such that after about 30 minutes or so you would have hundreds of milliseconds of delay.
I narrowed it down to my ultralite's midi interface, and I'm now using the Elektron TM-1 with Live as master and syncing the two machines to that, and it hasn't drifted at all after I set the initial clock sync delay in the live prefs.
Ok I guess that wasn't really about the Machinedrum now was it? :)
I've had a machinedrum since 2002. Just upgraded to the UW MK2 recently.. the sampler really is amazing.. Unlike any other sampler I have heard or used.
What stjohn says is spot on though, after you dig in, the sounds you will be able to create are much more diverse than anything you would conceive initially.
If you're after instant gratification, it's not for you.
If you're willing to dig in, the rewards will be wonderful.