Yeah, got turned onto it by a couple of friends here on ECF. Haven't tried those Rutheless flavors you are talking about.
DIY isn't that hard to do, but you do need to read read and read A LOT more! Totally worth it though IMO. Make big batches at one time, don't have to do it so often. The experimentation is the hardest part IMO, coming up with something vapeable (that is, if you aren't on the 10/90 or all unflavored VG cloud train).
And yes, you know you've done well if you smell like JP-8 at the end of the day. My wife knows if I've bent wrenches or not just on how I smell when I come home LOL.