The VGA converter gives a great still image, but if you're a hardcore gamer, you will notice some small artifacts in moving images or videos. Also in blinking texts.
The converter has an "auto" button for proper syncing with all the boards I've tried.
It works great with any kind of MVS's, CPS2, and pcbs like mortal kombat, the simpsons, raiden II, etc. I've not yet tried it with vertical games.
I've made some superguns with this converter for people asking me VGA out and not caring about artifacts. I always advice customers about that artifacts before building the supergun.
More info: it has RGB pots, you can adjust the resolution, brightness, contrast, size, position, etc. When you turn it on, it shows an annoying big chinese letters (I guess it's the brand) for 4 seconds.