My MP20 is just over a year old & nothing has gone wrong apart from the fact that it's got slightly noisier over time. Nothing too drastic but noticeable when compared to a new pump. The extra noise seems to come from the side.
It still works 100% & I'm happy with it. So happy that I've bought a MP40w ES & also have an upgrade on order with J&L to convert the MP20 into an MP40w.
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