I highly recommend anyone travelling to Vegas to consider staying at The Signature, especially if travelling with children. I have stayed here the last three years to attend the Pac-12 Men's Basketball Conference, which is hosted right at the MGM. The Signature is a relaxing oaisis to temper the fast-pace of Vegas. I get groceries delivered from Vons and can cook great meals and make my own cocktails in the unit due its fully stocked fridge (has a blender too). The pool areas are much more spa-like and you're only a short walk to the MGM casino or the MGM pool with lazy river. To me, it's the best of both worlds and I'll only stay here for future trips to Vegas.
Helpful hint - you can pay a small amount for an early check in or check out, I didn't know that at first and that would have benefited me since my flight got in at 8am.