I have been involved in the portable sanitation industry for almost twenty years. In that time have dealt with PolyJohn units and staff quite a bit.
Recently I attended a waste water Nova Scotia meeting with a small trade show. PolyJohn was the only toilet company to attend. I started to think that we are quick to complain about things when they don't exactly go our way, but sometimes don't tell people or companies how appreciative we are for all they do. It means a lot to me that PolyJohn always makes an appearance at such shows.
As far as your product, it holds up amazingly. We have units that are almost 20 years old, and they are still in use. All of the unit's parts are interchangeable, and easy to fix if something does become damaged.
The staff at PolyJohn Canada is always easy to deal with, and is easy to reach by phone or e-mail. If we need anything, it is only a day away. So keep up the great work, and see you in the future.