Overall, our stay was okay. My girlfriend and I spent four nights here for a music festival in SF and just wanted a place to crash between show days. I wouldn't stay here for anything other than that. There is only one chair, and no other seating (unless you like eating on your bed) and the entire cottage is about the size of a hotel room.
The pros of staying here are that the BART station, which can pretty much take you anywhere, is about a 10 minute walk and the cottage was very clean when we arrived.
However, there were quite a few cons. The WI-FI is an extension from the main house and is almost non-existent -- not great when you need to get online for anything work related. This also meant we could rarely, if at all, stream anything from the provided ROKU. We messaged Micaela after the first night to see if there was a workaround or any suggestion they might have, but we never received a response at all. The ROKU did not come with the necessary USB box to plug it in, which meant in the rare times it would stream Netflix, we had to choose between charging our phones or trying to watch The Office. The shower leaks when you use it, which means walking in and out of the bathroom will track water basically everywhere if you're not mindful. The bed is pretty hard, not very comfortable but not the worst we've slept on either. We paid a pretty good amount, considering it was a summer weekend during a music festival, so I wasn't too happy with the value, but on an off weekend it may be worth it for a crash pad if that's all you intend to use it for.
TL;DR: Very clean and location was nice. Terrible wi-fi and a couple small issues. Cottage is very small with no place to eat. Would be okay if you're only using it to sleep there and nothing else.