What is the quality of Venable wall-hung boilers?

I use the German Venable condensing wall-hung boiler, the effect is great. Using the world's most advanced condensing technology, compared to other brands of wall-hung boilers, better energy-saving and efficient. After purchasing the wall-hung boiler of Germany Weineng, there are professionals to install, debugging and teaching, so my old man will also use, do not worry about not using, after-sales service can also be.