Inawera is a potent brand of flavoring for the most part. When it comes to their tobaccos, I've used as little as 3-5 drops per 10ml. The only time I'll go above that is when I am mixing with something equally as strong, or I need to better balance the flavors out. The majority of them stop at 1 Drop per ml and anything over that is simply overpowering to the point of being too strong. With such lower usage amount, steeping and getting a really good mix is crucial. They are one brand that I test using a UC 99% of the time to make sure things are dispersed as I'm not going to wear myself out shaking 10-20 bottles.
Virginia is unique and potent. I'm not a huge fan, but it's certainly not the worst. It definitely falls into the ~5 drops per 10ml range (for me) and you really need something to balance it out a little more as it comes off as having some really sharp notes to it. I've yet to revisit it, but at the current usage, this little 10ml bottle is going to last me a very long time; long enough to get something that I like I'm sure.
Their take on Burley is pretty good as is the tobacco "C", which almost has a sugar cookie like taste to it (~8 drops / 10ml for both). I've never tried using their bases, so those may enhance flavor more than using a standard blend of basic PG & VG. I know a few members here have used them with success.
Inawera's Caramel, to me, is simple not caramel, at least not in a sense of caramel we have here in the US (and not specifically the overly sugary non-bitter kind). To me, it needs a long steep to really bring anything out and even then, it's not my go to. As much as I'm not a huge fan of TFA's Caramel Candy, I'd probably use it over the Inawera Caramel. I haven't have the opportunity to try their vanilla(s) yet.
I don't want to talk much about other brands in this thread and I mostly understand and agree on what you said.
Burley and Oriental are ok, being one of them very "dry" and "ashy", sorry I can remember which one (this old brains has seen better days).
Now my main grudge with Inawera is the "drops" way of work.
Inawera claims 20/ml
Inawera recipe posts at around 23-25/ml
I tested around 40/ml
Many users here say 60/ml
What the heck, even Inawera's own posted recipes, drops/ml are different across ingredients...
When you're referring to 3-5 drops, we can be talking anything in between 0,5% - 2,5% and, we agree on potency, that is a very wide range. We might be talking about something completely different, taste wise.
Look at my error on We2's English Blend. From 5% to 3% is a completely different vape.
*rant over*