Although I had misgivings about this developer when I first brought some last year, I've since come to really appreciate it. Especially when buying from Analogue Wonderland it's the cheapest powder developer available anywhere in the UK or anywhere else to my knowledge.
I didn't like it when I first tried it last year as I was using Adox film, which probably requires a longer development time in Foma developers. But when you use Fomadon with Foma brand films (also cheapest from AW by the way) you get a very decent result. Here's a few tips.
I always do a prewash for a couple of minutes, making absolutely sure I get rid of the antihalation layer before I start development.
I have found that overdeveloping a fraction brings out the best in this film.
ToI personally have stopped using stop bath with Foma films as they tend to scratch very easily. A healthy few doses of room temperature water will do, which also leaves a bit more time for the film to be affected by the developer, as mentioned above.
Overall a good developer from a great website.