I think it's great! I found it today, tested it, and immediatly was convinced. I have alrady created a training profile with some of my databases. I especially like the configurability, and the scoring.
Tip: An a bit bigger success margin (e.g. 0.20) makes it easier, while the training effect will still remain good enough for many players. Also, I think long computation time is not required (except for GMs).
Useful to know: Some (UCI) engine settings need to be done using the uci commands, like:
setoption name Hash value 128
setoption name NalimovPath value F:\Tablebases\
(enter that in the "init commands" box in the engine configuration)
I found that if the PGNs of common opening suites are designated as books (book moves), then they don't work for me at the same time for test positions. Therefore, I have given them a weight of 0 in the profile. But the rest works fine in Vista 32.
I like it most when it says "Better than the engine!"

which happens sometimes, to my own surprise.
I have reduced the number of tests for the penalties history to 100. So, I hope to see improvements faster (or the opposite....).