I am sure David's Tank will be perfect. However, epetrillo, I think; as far as the idiot-proof/ express/ almost-plug-and-play factor goes, Penelope is perfect herself.
IMO, there will always be a bit of a learning curve to anything repairable. So, being an experienced vaper might be kind of necessary to make the most of it, somehow. Then again, by the time Strata hits the street, you will be more experienced, by then, and it may result into a more natural and user-friendly device to you. Just wanted you to bear in mind, though, that when you 'go advanced', meaning the repairable route, things won't be 100% idiot-proof, out of a natural inner complexity to such advanced gear...
Just my two cents here...