First I used this on an existing arena. It didn't work on the first game but worked for the rest. It noted a win in the second game but didn't know it was a win (disconnect). I had to enter the rewards but based on other threads this is normal.
I attempted to use it for card draw but even though the info box correctly showed each draw's cards neither the info box nor the browser made any recommendations. I entered the card draws manually in the browser to get recommendations. I only entered 15 cards but the system doubled every entry so it thought I had 30 cards and my card draw was complete. I'm now half way through card draw and cannot complete it since I can't edit the deck to remove the duplicates.