Just to update, I have very much enjoyed the bolt. At first I was concerned about paging through screens, but just a little practice/use, and all is well
Screen is plenty large enough, and light enough, to read while riding.
The only negative, if it can be called that, is that I had to use the zip ties to mount the bolt to my Verve 3 handlebar.
Oh, there is one other negative: I don't see a way to monitor the charging when the unit turns off. I have to turn the unit back on to see if the bolt is fully charged, then turn it back off till I'm ready to ride again.
I'm very glad I bought it!