When the show sticks to what it does well, it's great. Any fan of Batman and his lore will eat this stuff up. However, too many unnecessary subplots, many of which turned a great show into a soap opera. Also, there are several plot holes so large it's hard to overlook them and continue on watching. That being said, I was hooked on the many positives of the show, and had to watch to the end. There are several superb acting performances(Riddler, Penguin and Bullock), but there are definitely others that are quite amateurish (Bruce and Barbara among others)
Watch it, enjoy it for what it is, but the writing at times is pretty muddled, and if you start dissecting it you'll not enjoy it.