I have had good and bad experience with them.Last go around they had my opti 5 times and couldn't fix it so i brought it down to the lake and the guy knew what it was as soon as he fired it up. Ended up being the reed valves.
My opti used to have a beep go off when coming out the hole up on plane and if ya let out of it then back into it it would stop and run fine. Ended up being a weak battery.The opti has to have a min. of 1000cca or it aint happy. New battery and all was fine.
Hope this helps.
There will be days when the fishing is better than one's most optimistic forecast, others when it is far worse. Either is a gain over just staying home.