Trying this out now. I'm used to the whole C Drive thing, that doesn't really bother me. I've seen a couple of posts about it not being "user-friendly", but I haven't had any issues so far. Admittedly, I looked around the application before I began downloading anything (nice to see a single area to set the external tools up for the game - that was a concern of mine).
So, my exploration, I started downloading some mods (140 so far). It's a little slow at times, but that's understandable given how much I'm throwing at it. There have been a couple of times where a SOCKETTIMEOUT or similar error has popped up, but just re-downloading the mod again took care of the issue.
Admittedly, I am still downloading mods (go big or go home approach), but I am liking the feel of it. Nice to know I could import from NMM or MO if I wanted to, but I tend to burn what I have and start fresh a lot, so I'm taking that approach.
I have to say, I am definitely liking it better than NMM, and am definitely looking forward to the continued progression of this new application. Awesome work all-around =)