I really like my Bartelby. I have it in 510 and it leaks a bit but so does my Joye 510. I have learned not to drip so much. 4 or 5 drops is all it takes to keep it from leaking. I have also had a problem with the switch, but I've contacted Cybervex and he says that he'll replace the switch for me. Thats good service if you ask me.
And don't worry...a little leakage won't hurt anything inside the box. The electronics are very well protected.
I highly recomend the Bartelby for an inexpensive 3.7
mod. BTW, the Bartelby does not opperate at any higher voltage than 3.7. If you're looking for a 5 or 6 volt
mod, you'll have to look at something else.