Hi, Vista phono here. Unfortunately, I can't give a first hand comparison to the others. "They" say the Lounge Audio MM stage is the only competition for the money.
I bought it as a tool for checking MM loading options. It reminds me of my AHT with plug-in resistors, and I'm really pleased with the performance. The sound is neutral with good resolution - just what I was looking for.
It comes with 47K and 150pF as the standard load and you install resistors in parallel for a lower value, but you can order it however you want. They'll put in whatever capacitance you want and you can order it with no native resistance. Then, whatever value you install becomes the resistance. Mine has no native capacitance. They put in another set of sockets and I load caps also. It's a bit fiddly that way, but I have the flexibility for many different carts.
Gain is adjustable from 40 to 70dB. Currently I'm running a Stanton 980LZ at 1.2K with 60dB gain.
It's tiny - a few inches long. I put a weight on top. The only caveat is there is no ground lug. You can float the ground or if there is noise, connect it to another component. It hasn't been a problem.