I'm quite new to Basschat, so I hadn't seen this thread before.
I bought a Letts 5 string fretless nearly two years ago, and as anyone who tried it out recently at the Midland Bass Bash can vouch, its simply lovely.
When commissioning and buying this bass I found Jon to be very helpful, and he shared pictures of the build on Facebook.
I sympathise equally with those awaiting their build, and with Jon and his family in their circumstances. I have no reason to doubt his honesty, however naïve his recent customer care practises might appear. As the cliché goes, what doesn't kill you makes you strong. I too look forward to reading the reviews once the backlog basses start to appear.