I am writing this review from the perspective of someone who is very familiar with the area and was forced to find temporary lodging for my family (wife & I early 40's with young son) due to emergency repairs on my home. I stayed here a little over 14 days. As a world traveller with experience staying at AirBnBs for many years, I provide you with the input I wished I had received prior to booking.
The inside of the home is adequately reflected on the images. The place is fairly rustic with features that are original to the space (e.g. wall heater) and some additions (e.g. 2 wall unit A/C only). The bathroom is the only area that seems to be recently renovated.
It is a team of 3-4 people who manage this unit. Never quite knew who would reply, but they were quick to respond and address any issues/questions. The one issue I did experience was with the TV (the entire screen went green when accessing Netflix); they were quick to try to resolve, but when I was asked to reinstall the apps, I chose to not use the TV since I had too much work to do and I am not too much into TV. No big deal.
LOCATION: insist that you are provided with the EXACT location of this unit prior to booking. I found the location on the listing to be significantly off from the true location of the unit. Though this unit is located on a fairly quiet street, it is at a crossroads. I will explain. If you go a few blocks in one direction, you will come across multi-million dollar homes. However, if you go in a different direction, you will likely not feel very safe, particularly at night. This could matter to some, but maybe not others. I can see PCC or CalTech students or visitors finding it very convenient and not too bothered by the exact location.
If you stay at this place, you MUST ensure you can be exceedingly quiet and limit your outdoor activity before 7am or after 9pm. As your hosts will remind you via multiple emails prior to checking in and during your stay, the driveway where you will park your car is adjacent to the bedroom of someone in the opposing building. Per their instructions, you should minimize accessing your vehicle before or after said hours. After having to access my car 3 times in succession to bring groceries into the unit (around 7pm on one day), I can attest that you will be met with a VERY rude man, screaming that you are being "too loud". I do not blame the hosts as they cannot control their neighbor's actions. However, the hosts are WELL AWARE of this situation and have "an agreement" with him; frankly, I do not know why they would knowingly continue to welcome guests when they know there's a good chance they would be verbally abused. Your call as to whether you choose to roll the dice.
VALUE: again, it depends on your key criteria. If you must stay close to PCC or CalTech, this unit is indeed good value. If you are a tourist, and desire to use Pasadena as a home base, but have flexibility, consider looking for hosts in South Pasadena (particularly near the S. Pas Metro station). If you are in a bind, need emergency housing for your family, and don't have much time to research (like me), then I would say there are worse places to rent.