We have a couple in the house - the wife uses them. They're not for extreme vaping at all, but if you like a nice mellow single coil in the higher ohm range and want some regulation, they're nice.
There were two (at least?) different buttons used during their manufacture, and some have said the original button was something that also went bad with the VVG's. We have one of each - both work great.
Mine has what is termed the "original recessed" button I believe. Might be all that's wrong with it, I've still never bothered to troubleshoot it with more Reos than I can use.
Since the wife is more comfortable with a regulated mod, I would prolly send them to Rob to be mech converted should they break down, after which I would fit kicks in them.
If you're comfortable with "modern day" grands and such, I'm not sure a VVG would up your vape game, but then there's the 'piece of REO history' aspect - when these are gone, they're gone forever.
Exactly why mine will most likely not be modded to a mech, at least not as long as I own it.