You're asking the wrong person. I don't like them. There are plenty of folks who love them and quite a few more that like them.
Not really research. I've been vaping so long that I've seen plenty of these things come and go and tried all kinds of stuff. There's always a new latest-and-greatest. I just keep dripping. I'm tired of trying the latest and greatest and being disappointed.
You're in the time to try different stuff and find what you prefer. Most folks who have been at it for years kinda' settle into what we know we like and smile at the latest and greatest as it goes by. Sometimes we wave. Sometimes we harumph and just keep rocking on the porch.
Now for the good news, you've reached the 5 post milestone. When the servers reset, here in the near future, you'll be able to post on many other sub-forums. ECF no longer considers you a new member. You'll be able to send and receive PM's too.
I've spent some time in Owensboro at a prestressed concrete plant. If you have some free time, you may want to head northwest across the river and visit Vapor Bank in Evansville. Tell 'em Hoosier sent you. If John, the owner, is in, he will know who I am. Good selection of products at decent prices there.