I've stayed at TI back when it went by Treasure Island and didn't know what to expect since its been a while.
I was pleasantly surprised when we got to the room. Its been renovated since my last stay, which is a plus. There was a flat screen TV, but the TV was tiny. I would say no bigger than 32" if even. Bed was comfortable and clean. Bathroom is pretty spacious compared to other Vegas bathrooms.
TI is connected to the Mirage by a tram, which I recommend in the blistering summer heat. However, when you exit the tram at Mirage you are outside so be prepared.
The weekends can get pretty pricey, but luckily we got a special rate. I don't know if I would stay here if I had to pay the normal/regular rate. There are better/newer hotels out there that are comparable to TI's rates.