I have seen the facet cube pumps last a long time. I just put one on my truck. So far so good. Sounds like a little woodpecker under the hood when you turn the key on. Of course you can't hear it when the engine starts.
The mechanical pumps will eventually wear out too, nothing lasts forever. It's seem like most guys are drifting away from the facet pumps and over to Holley pumps. I been using the holley pumps for a while and haven't had any trouble.