I use the same tank, the same ejuice, from the same supplier for 4 years now. I am happy so... I am also not spending hundreds of dollars every year on the next best thing.
If what you've been using is working for you...it's all good. Quite a few people still use older tanks, clearomizers, etc. Nothing wrong with that, as long as replacement parts for them can be found if needed. If/when your PT2 tanks bite the dust, PM me if you want more. I have a stash of new ones, and I'm in Florida, too.