I've had my L1 since 2013. The only thing that has failed is the pump, which went just out of warranty. I was the first person this happened to, and Reiss was kind enough to send me a replacement part for free despite being out of warranty, and then FaceTime me through the installation.
Any other issues have been solved by replacing seals and re-greasing the bore.
It's been a fantastically reliable machine with superb service whenever I have needed it. I don't think I can think of another company whose product and service have been better.