Number one is the cost!
The retail is around $2000, you can get them for under $1800. This is a pretty big downfall of the high cost. Some people feel this way about the cost.
You should already know this Just by looking at it. Overall length is much shorter than a AR-15. Some people love them. Some people hate them. They do have a lot of advantages and the disadvantages can be overcome with Training.
Uses standard AR-15/M16 magazines
Most of us own a AR-15 and we have lots of wonderful Pmags around. It is wonderful we can use them on the Tavor. Also that Flat Dark Earth color looks good.
100% Ambidextrous Configuration
This is a big plus for lefties. Good for cross training. Get your Magpul art of the gun skills going.
Optional Conversion Kit
They have kits for 9mm and 5.45×39. This ammo is a lot cheaper to shoot. Can be as low as 13 cents a round.
Backup Iron Sights
These sights actual look pretty good. and that is a savings of $100. Not all models have this. Make sure the model you are looking at does.
Tavor Weight is 7.9 Pounds
That is kinda heavy when you can get AR-15 at 6 pounds. Most of the weight is in the back of the gun and feels fine in a bulpup, but you be the Judge. IWI makes good stuff. This one may or may not be right for you. The deal breaker for me is the cost.