Yes, it works pretty well, the only thing I found, is about 3 years ago, the system let me add stamps to seasons that had already finished for the year. This year, I had to call the office, because in one section of the system it said my license was expired, but when I went in to add a license, it said I couldn't because I still had a valid license, when I clicked on the link provided, it showed me that the license was expired. I ended up having to call, and have them fix it before I could buy my new license. No biggie, but I couldn't get a human on the phone, and had to wait a couple of days for the call back.
The system for Maine seems to work pretty well. I've never run into any glitches there.