Reply to APC 20 - Should I get one?

OK here's the deal.

I'm moving to Barcelona for a year in about 10 days. I currently use the setup you see below, basically Traktor + VCI-100SE + KX1. I'm considering using some of my free time this year to learn how to use Ableton in conjunction with Traktor and I believe the APC 20 looks like the thing to do it with, but I need an excuse to shell out for one!

Does anyone have experience with the APC20? Is it worth it?

ALSO, is it worth upgrading to a full version of Ableton Live straight away or will the APC edition do most of what I need?

All comments welcome