Honestly speaking, the cost of Receptor doesn't quite justify it.
The slow notebook startup can be a pain. I just completed 6 sessions of live playing Roland VR760 + my notebook setup using softsamplers. Gave me a headache. Some times, I had to edit the samples on the fly (yes, I mean editing in the sample editor during live playing!!!!). Perhaps the reason is because I'm still using Kontakt 3.5 and have yet to upgrade to 4. But it's no fun to do that.
Alternatively - use NI Komplete with Kore 2. I'm going to get Kore - esp after this last session(s) for the past 3 days. It should load third party VST. I use Chineekong stuff as well (not the percussion, but mainly the winds and strings). My notebook - despite the slow startup and some pain sometimes, it doesn't crash. Even if it does, I know exactly what to do. But so far, in all my live playing, it hasn't crashed on me during live playing once. If the Receptor crashes (which it does), well...it's probably going to get more tricky. While preparing (and programming) for my last session that was just over, I had been researching again and trying to find the best way to do it live with minimal pain and quick access to all my samples/VST. I even gave Plogue Bidule a try. I was about to try VSL Ensemble Pro. In the end, my conclusion is that I should just get Kore 2. Actually, I'm going to wait for Kore 3 - hopefully it will come out soon (with 64bit support).