The Virus & Wakonda are great! CLS is good too! Wakonda will need to steep, but do try a little bit before setting it aside! CLS also gets better with steeping, and can go on improving.
Virus is wonderful! Right away it's good and each week, you could taste something slightly different! I had to mix mine with 80% Crème Brule because of the PG content

...but, I could taste vanilla/caramel, maple, hint of almond, mocha, latte, a light hint of spice ...many things - and not a big tobacco taste - it's just brilliant in my view ..and why I find it a bit heart-breaking that I can't use it!

Wakonda is the same - very good, but you won't get the black coffee properly right away (again, try a little bit so you can compare as it steeps) It's another complex flavour with layers just like Virus is and includes vanilla, custard, coffee, mellow tobacco. The coffee is a flavour from the NET. It's another that makes me sad because I can't use it!
NT have recently gone to glass bottles but only as the plastic ones go out of stock. In glass, the use by date is a year from the made date, so you can judge how old/steeped it is when you get it.
A really good thing with NT's is the mixability of them - it's amazing how well they mix with each other. A lot like the Virus as is and also with either CB or CLS in varying ratios, but they all go with many things in the range.
If for any reason you aren't too impressed on arrival, let them steep and try a tiny bit each week ...you'll be able to taste the differences in the Wakonda and Virus. Some people let them sit, others use them and enjoy the gradual changes as it mature - particularly Virus!
CLS is like any other custard: improves with steeping.
I have three NET's coming from Heathers Heavenly Vapes, and will get another two/three ordered soon from Indigo direct. I have one Indigo coming from Cloud House France that is half RY, half a NET. (Eastwood: combo of Duke & RY)
They're customisable, and I ordered mine in max VG, so with luck I'll find something I really like!