I picked up the Sigelei Moonshot RDTA today, I love it so far. No complaints, other than it's a little more complicated to build on than a regular RDA. To be expected though, and it's not really difficult, pretty spacious.
I definitely recommend it so far.
If there was one thing I'd change about it, it would be the stock wide bore drip tip. It's plenty wide, but too short for me. It also functions as a standard 510 drip tip adapter though, and I popped a regular one on top, and it's great. Normally I don't like using a 510 drip tip (too narrow for dripping), but I won't be dripping through this one, so it's perfect.
Edit: After further time, it's even better. Wicks great at .4 ohms 24g 10 wraps dual coil. No dry hits even with heavy chain vaping, and great flavour/vapour production. The short widebore drip tip gets kinda hot though, so I'm sticking with a jade 510 tip instead.
WAY better than I was expecting it to be, to be honest. I thought it wouldn't beat my Lush RDA, but it does.