it works okay, as long as you understand the limitations. You should have/will need 2 batteries, one in use and one on charge, and don't expect to get the range or speed the manual says you will get. You're pushing almost a ton of displacement hull, which is different from pushing a lightweight dinghy or planing hull.
Add up the cost of a 50 lb thrust trolling motor, solar panel, solar panel mounting system,two batteries, wiring, charge controller etc., and you are damn close to, if not more than, the cost of a 2.5 hp Lehr outboard...
LEHR 2.5 HP 4-Stroke Propane Powered Outboard Motor
which strikes me as being a much, much better auxiliary solution, with easier-to-stow fuel that still works reliably no matter how overcast, and no gas or oil onboard- it's the same fuel you use for your bbq grille, and can be stored in a pvc pipe propane locker clamped to the stern rail.
If the stars align properly I'll be testing one soon, but all indicators are that this is a great little outboard.