It was our first time staying in a "Garagement" so we weren't sure what to expect but it was great! Essentially a garage converted to an studio - it was clean, nicely decorated, essentials (towels/linen/mini-fridge) provided.
Location - really good. Close to Venice beach. No noise at night - we slept very well.
Parking - on-street parking available.
Check in/Check out - really smooth. Patrick was very communicative. Much before our visit, he contacted us with all details needed and his information. Gave very detailed inx on how to check in case he wasn't in when we arrived. He also let us leave our luggage at his place after we checked out.
The only thing to note is that the bathroom is located a few steps outside the garagement which was not a big deal for us and even at night was easy to get to. It is part of the main house however the entrance was outside hence was private and only used by us.
All in all, would highly recommend staying at Patrick's place. He's a great host - always available, very communicative and provides all the information you need. We had no issues and were very comfortable staying in the garagement - and slept really well!