I just picked up my second 353. In between them, I had the TYM 503. I have had excellent luck with these tractors. I went back to the 353 once I had all the new construction work done on my place.
The only issue I have found is a lack of dealers in my state. I do my own repairs, but need to plan ahead with maintaining filters oil/air prior to service.
Also, I wish they had a better on-line manual for both the service and operators!