Hi there, we too experienced the same "crazy secret-code" type of conversation/visit with United Mfg. Be very nervous and very cautious.
They have a lower quality product which they will sell for a fantastic price but they will not give you any estimated operating costs because they are nor fully insulated! Do your homework and pay the extra for a quality tub with a good warranty, happy customers and good service records.
The tubs look pretty and all, but everything is very hush-hush and there is no information to be found on the company background and they will not stand behind the product the way other more reputable manufacturers will.
We are still looking and doing our research and very thankful that we were so suspicious of this dealer.
Remember, you always get what you pay for! AND Pay now, or pay later...!!
Best of luck!
Kendra