tldr: okay for the price.
Let's start with what's good: the price and location. It was several hundred dollars cheaper than anything else nearby, so no complains from me. It's super easy to get to the orange line (~3/4 mile or 12-minute walk but I walk fast) and easy to drive to downtown Pasadena. About 45 minutes from the airport with no traffic. It's on a hill with a pretty view. From your room, you can't see it, but coming and going you'll get a peek. There was shampoo, soap, and towels, and the place was reasonably clean. The bed was actually really comfortable though the mattress cover was a little grody (no evidence of bed bugs though). The water was hot and the bathroom was easy to use. It was a little hard to find (the geolocation that is in the check-in instructions is not correct and the instructions are somewhat vague) but Janice helped me out and was very quick to respond. There is a desk and a couch that makes it easy to work from. There is wifi however it comes in around 12-15mbps though it is a steady 12-15, which makes youtube or parsec really solid. Parking was straightforward and not on the street.
The less good: it's basically an outbuilding that has been converted into an Airbnb. It has cinderblock walls and a single window. As others mentioned in reviews, the bathroom is a European-style wet room where the entire room is waterproof. The floor around the toilet is not slopped correctly and does not drain so you get a big puddle of water around the toilet. Pee before you shower and you'll be fine. However, this means you have tons of standing water. When I first walked in, I thought it smelled like someone had smoked weed (not a pleasant smell to me). However, the smell lingered which makes me think it was more of a damp type of smell. There was some road noise/train however I thought it was workable though there isn't a good way to mute it since the AC window unit basically means the window is slightly open.
Overall I'd say you get what you pay for. I don't really have any complaints, especially at this price.