Haim's place is clean, comfortable, has everything you need and the balcony was great! I hadn't been to MGM/Signature before and knew it was right off the strip but it is a bit far for walking purposes, as a woman wearing heels the majority of the time. Expect to uber ($5-10) to and from the strip if you plan on going past the lower end. The great thing though, is that all of the towers are connected to one another + connected to MGM grand, which I wasn't expecting. You don't even have to step foot outside to have access to everything.
I'm happy we stayed at the signature as it was an overall better experience to me, in comparison to staying at MGM grand or a lot of other hotels due to the following reasons: 1) each tower has t's own pool and they are much less crowded than MGM grand pool/others - it's nice to visit the others for parties but if you want seating/lounge space, it's perfect. 2) You have the option to have a balcony - none of the MGM rooms have that - nor do many of the hotels besides Aria + Cosmo off the top of my head 3) Great room space