My gf and I stayed at Mark's place for 3 nights. Overall great experience and we would stay again.
Pros:
Kitchenette - We took an Uber to the Vons down the street and were able to save some money by eating in for a couple meals.
View - Great view of the airport and the surrounding city. Also a view of MGM's pools & day club.
A/C - Blows really cold.
Location - Walking distance to the strip. I enjoyed being able to get away from the smoke filled casinos.
Cons:
Even though Mark's place is the closest tower to the casino, it is still about a 10min walk. The walkway between the Signature and casino is enclosed,air-conditioned and has moving walkways. We didn't have a problem with the distance but this could be a problem for some.