Had a great stay at Kieu's place in Rosemead. Conveniently located right next to a shopping strip mall with Target, Pizza, Boba, and other food options -- it's also located very close to some of the best food options in the 626/SGV area if you're a foodie like us (Savoy/Huge Tree Pastry/Mama Lus/etc)
Keep in mind this is a smaller guesthouse located behind someone's house. The entire house is private but you are sharing the surrounding backyard with other families. That being said, we weren't disturbed or bothered by anyone else during our entire stay there.
Kieu is fantastic at communication, providing easy check in instructions despite our late night arrival, and was able to answer/help us quickly when the Wifi went out. Wifi worked just fine for browsing, however was slightly slow for business use.
The space was perfect for 2 travelers, with a sofa bed and large queen bed in the bedroom. Note it is a smaller space so I would only recommend if you're close with your travel companions as the Bedroom and Bathroom spaces are quite close/tight. Brand new appliances and kitchen made eating and reheating food super easy and enjoyable, Brand new Samsung smart TV as well kept us entertained.
Central AC/Heat worked super well, keeping us cool during the day and warm through the night (During LA Winters - 76 high and 50 low). Outlets all over the place so no worries about charging devices or setting up a workstation.
Just a heads up, Bed and Sofa bed are both on the firmer side.
Overall, i'd definitely return as this is a great budget option when visiting the area and super responsive/friendly hosts.