I used it last weekend to tune a customer's drift car and my own DD as well, flashes a bit faster than 2.24, I like the new interface, great job so far.
Only real crap that i came across was in editing, i couldn't get it to copy histograms in the 2.24 logger and paste changes into the 2.25 editor, had to do each change by hand, so it took longer dialing in the MAF and fueling.
Funny thing is I used 2.24 editor to do an initial read entire on a new car i was tuning, and it didn't want to license the new ECU. Once i opened the file in 2.25 i was able to license the new ECU no problem.