Not from an operational standpoint. I've been using one for 6 months now as my primary camera. I have two other stock lens cameras that I've used but infrequently since getting the PixAero.
As for the installation, when I bought my second H I requested that CarolinaDronz install the lens before shipping it. They also installed a 2.4gig antenna upgrade at that time for me. I understood up front those actions voided the manufacturer warranty and accepted that. Changing only the lens would void the camera warranty, leaving the H warranty intact.
Since that time I've encountered only one "issue". The PixAero lens often uses only Teflon tape to achieve a tight fit and the lens might thread in or out a little when being cleaned. That changes focus. Re-focusing and applying a drop of hot melt glue between the lens and camera frame locked the lens in focus position.
The PixAero lens is well worth doing.