I'm not a USI/Wittern fan. They service just like an other machine, work about the same as any other machine, however, the supply line for parts is pretty much through their small network, which makes parts hard to get and expensive. Because the bottlers are customers of Dixie Narco, Vendo, and Royal Vendors there are an abundance of parts available for those brands of machines everywhere. I don't own any USI machines, but service an account that owns about 10 USI 3545 machines when they have problems. The majority of problems are the cooling decks. I have a guy that does refrigeration for me, and he has never had any issues that could not be resolved. I'm also not a fan of dropping carbonated drinks from a shelf to the delivery bucket. Really, I think it all comes down to what choice you want to make for your equipment, I tend to purchase the same brand of equipment for uniformity, but I have bought a machine or two that was different from the rest, simply because I couldn't pass on a good deal.