R-tech have a very good customer service by all accounts, maybe not in Boc/Easb, Fronus, Lorch, and other top end machine manufacturers league, but lets face it most, if not all the components come from the far east these days. Its just quality control and the back up service we pay for these days.
With 2 years RTB warranty for the price its a good deal.
had my r-tech 201 just over 2 years now and still pleased with it,
the adjustable ac frequency is a nice feature to have especially on thin sheet or fillet welding.