one of the staff in reception didn't give a good impression. he was just like an grumpy old man

Location is the best part about this hotel. It's within walking distance from International Airport (it's an hour walk, but still), bus and trolley station, as well as Balboa Park with its 17 museums.
Service- and comfort-wise it's very fair. It's exactly what it promises to be. Rooms are well-equipped and appliances are functioning, bed-sheets are changed rigorously, breakfast is average carb-pumped kind, that is usually offered in "inns", although it's still not bad. Receptionists are nice -- you don't bother them, they don't bother you.
I can imagine, how it can be noisy, taken the location on account, but for me personally that's never been a deal-breaker, and during the time of our visit it was actually surprisingly quiet.
One should also keep in mind, that they freeze the whole sum of your payment on the day of your supposed arrival, then unfreeze it fully after you actually arrive. Again, that wasn't a problem for us, just something worth remembering.
Overall: it was a very pleasant stay.