Completely agree with this. Previously I was a PM at a rather large (valued >1bn) sales software organization. I was tasked with building a completely new product to replace the original product. We built an MVP and had our internal sales team use it. It wasn't easy, it took some motivation to get them to use it over the large, steady, enterprise solution they were used to. But, they used it enough that we received considerable feedback that we rolled into the public beta, which was much bigger than an MVP.