Sergio's and his place are amazing.
The suite is quite large, and everything is well thought out. I doubt that you will find that something is lacking.
We have pretty high standards when it comes to cleanliness, and the suite exceeded our expectations.
Even though we'd been to Lisbon before, Sergio's guidebook was very helpful. He even sends a pdf version that you can use while you're out and about.
Other notes... the beds are firm (or medium-firm), the unit is up three flights of stairs, and the AC works well (just make sure to point the remote at the unit, otherwise nothing happens).
I would definitely stay there again.