Amazing!
I first bought one chinese machine, Baku was the brand, and after a couple of years it broke down, since I had to replace it I choose Grundig to have a better brand, and I have to admit that it works amazingly good, things that with the other machine didn´t go off, in half the time this one is doing the job.
I use it for scuba diving equipment, and it takes away the salt of the things and cleans them like if they were brand new, I don´t know anything harder than 1 year dry salt on metal to go away, and this machine really does the job.
One thing that is not mentioned in the specifications, but I noticed that it also warms the water once you make it work, which also helps to remove the dirt.
As far as how long will it last, I can´t say, as i have it only 2 months, but the performance of ti is amazing.
For the cost it has, and the job it does, is without a doubt one of the best shoppings I did the last 5 years.

grundig! High quality and easy to use, with a large capacity for eyeglasses, even with a hand watch compartment. Please read the instructions carefully, as certain precious stones such as an Emerald are not allowed