Very responsive and gracious host - very willing to address concerns and to be flexible. Shelly was great and we have only good things to say about her. The Signature is what it is - in March of 2022 there's still some post-COVID adaptation, and many of the amenities (pools/Starbucks/gyms) are closed or have restricted hours. The other main thing to know is that the free valet service nominally closes at 10p, but is often extremely congested and/or on bypass, and you'll have to park in the MGM Grand Self-park ($15/day and about 10-15' walk). Finally, EV charging does not seem to be available through the valet - there are about four working chargers at the MGM grand, but they're often occupied.