Mattress covers are not washed after each guest. I slept on a bed that smelled of stinky fish due to human discharge on the mattress cover. I smelled it but I wasn't sure where it was coming from; I strangely thought it may have been my armpits (even though they've never smelled that way). I arrived very late and was very tired. It wasn't until the next morning that I realized that the smell was emanating from the linens themselves in the area where one's crotch would rest. That was a very disgusting experience. Isaac himself stated that the mattress covers are not washed after each guest.
This unit shares walls with an adjacent unit. There are no quiet hours so be prepared to hear noises throughout the night if you have noisy neighbors as we did. The walls between the units provide no noise cancellation/buffer. The people next door were so loud the first night that we couldn't sleep. We were awaken at 4am by shouting, screaming, and fighting. I had to call the cops. I let Isaac know of this issue and he contacted those guests. They were much better the next night but we were still woken up by their noises because, again, the walls provide no noise cancellation/buffer.
I did not want to leave a bad review but Isaac did not provide me with any assurance that these issues would be resolved for future guests (eg, washing after every guest, quiet hours). I interpreted his response as a you get what you pay for.