They are among my favourite RTA's, and I own a lot of tanks.
If you wan't dual coils, good flavour, and also something that can produce big clouds, they are fantastic. I tend to run mine with simple 26G SS316L 2.5MM coils, at around 0.25 Ohms.
It doesn't need much power, as in 40W or so to work well, and they work well with TC which I love. You can of course use some thicker wire or coil builds if you want to run more power.
If you are just getting into RTA's and want a dual coil one, I think you can't really go wrong with the Crius. I have 2 V2's and one V3, for that price I would definitely get one.