The mono-black one is OK, and only just OK, and it was a good way to see how -1/-1 counters can be played with.
Here is a game I won.... it didn't happen often.
The red/green deck is downright unplayable and only losses less because of all the elf lords I threw in it. I am looking forward to playing with the "-1/-1 counters matter" cards in Amonkhet.