No problem here. It's my job to keep up with the developments in the industry. I guess I do hate to see people selling welding equipment uniformed about the industry and definitely will counter statements I know to be untrue or misleading by people that should know better.
I find it ironic that salesman is talking bad about another product when he doesn't even know (or possible does know but is attempting to mislead you) about whether his product is an inverter or not. In either case, he isn't credible. I've heard people say run from this or that just because they have had a bad experience with a product, regardless of what the majority experience is, or they will tel you bad things with little or no real experience with them.
In many cases, things you hear bad these days in terms of reviews are from guys with little or no cross reference to what is standard, common or acceptable in the industry and little experience overall with a product. This is their first or second experience with a product and expect one thing and get another...which may be very common across most brands, but they take issue with it because it is strange or foreign in concept to them.
A very few short years ago, even just two or three, it was not uncommon to hear people talk bad about inverters, especially guys at welding supply stores. They would tell you the technology isn't proven, or it won't last. Inverters are throw away machines. Or that they'd never sell an inverter to a customer etc. I've worked for Everlast for 7 years now. I've heard it all. Guess, what? All of the major manufacturers introduced inverters in their industrial lines, and now in their lighter duty lines. These welding store guys are singing a different tune now. There's a reason these companies have introduced inverters. They knew they offered a lot that transformers couldn't, and that they could save money by making them without seriously compromising the name of the brand.
