My younger son woke up at 5am the first night with swollen eyes, running nose and unstoppable cough. I gave him Zyrtec and after an hour he went back to sleep. The next 2 nights I gave him the anti-allergy medicine before going to bed and he slept fine. The fourth night I forgot and he woke up again at 5 am with the same symptoms. My son does have allergies but at home we do not need medicine every night, in fact he almost never needs it. Granted, for people without allergy this wouldn't be a problem. I suspect that old and dusty rugs, cushions and sofa are probably the cause of this problem.
The day after our arrival construction workers with loud power tools, saws and hammers started to do a major construction job in the condo next to ours. We were out some of that day but we did endure hours of relentless noise. I contacted the host and didn't get much relief. Eventually Kelly contacted her point man who came to see me. By that time the contractors had left and he told me that the next unit was empty. The following day the work started again. Jim, the contact person, came and talked to the contractor next door. Jim informed me that the work would stop the following day, which it did. The Host didn't offer any remedy.
Some things about the condo are very good: linens and towels are new, clean, and plentiful. The kitchen is well equipped. The condo is very dark though, which might be ok for many but I found it depressing, particularly considering the numerous old cfl bulbs mixed with missing bulbs in many of the light features.
This condo is not as expensive as many in Mammoth but beware that it has some flaws