DO NOT STAY HERE!!! RUN!!!
I have stayed in many hotels/motels from Chicago, to Mexico, to San Francisco and the last words I said to the girl at the front desk was "this was the worst place I have EVER stayed!" Her response to me was "well, you will get a survey from the manager so if you can state all that then". 
I went on this trip to San Diego because I needed to move my daughter into her dorm at UCSD. I will admit that I was tired having just driven 3 hours to get to San Diego and that it was very tedious waiting to check in at noon as I still had 3 more hours to go. I had to park and take a nap so I could stay awake. 
When I arrived at the motel, I was in ok spirits and I will readily admit that the little gal at the front desk was very upbeat and happy as well as kind. She helped me check in and assisted me with paying my $3 for internet access. She mentioned because I was checking in early, that she would have to put me on the second floor of the "tower" building. I told her it was fine and I figured since the tower was obviously built after the original motel building that it had to be nicer. 
I had to park in the parking that was under the motel building and it oddly reminded me of a scene from a scary movie! It was damp, dark, and scary. There were no security guards and the elevator left little to be desired and I waited for the masked man with a knife to jump out from behind the vending machines! 
I got to my room, which was blocked off by the maid service personnel. Once I entered my room, I was greeted by the worst stench of cigarettes and mold. It was disgusting and this was a non-smoking room. I can only figure that whatever they wash the bedding with isn't working to get the smell out of the ever revolving linens between smoking and non-smoking rooms. Once I settled in, I decided that since I was very tired, I would try a nap. Once I laid in the bed, I kept getting the feeling of something crawling on me, which was more than likely due to the gross state of the room because there was nothing there. I pulled back the sheets and noticed old blood stains on them! I was so disgusted but what could I do but move over? After a few minutes of trying to sleep, I chose instead to try and do homework.
The internet was another issue. I tried for hours to access the internet to no avail. I dialed "0" for the front desk and got on one. I chose to call the 800 number provided and it took me a good 30 minutes to get the issue resolved. Once I hung up, the 3 simple steps left took me another hour to get through. Once I finally accessed the internet, I did all my homework (I'm in a graduate program) and when I hit send to submit my homework, I got an error that said the connection was lost. I had lost all of my hard work! I gave up at that point.
My daughter and I retired for the night at about 11:30pm and I was woken up 3-4 times with people running through the hallways yelling and screaming at 2am, 3am, 4:45 am...etc. It was an awful nightmare and I was even more exhausted than when I started my trip.
I woke up early due to all the noise and I went to take a shower. I was greeted by hair on the shower wall and a bug in the bath tub! This was it! I realized I couldn't take it anymore and I was disgusted and pissed! 
I went to the front desk to check out and the girl at the desk (while whipping her hair around) asked me how my stay was (see the first sentence). I'm still waiting for my email from the manager. After check out, my daughter realized she had left her pillow in the room so she ran inside to get the key. After she got her pillow, she went back in to the office to return the key but she was gone for a while. I went inside to find her waiting and the "hair whipping" girl flirting with a patron over football stories. I took the key, slammed it on the desk and told her "we don't have time for this". 
I failed to mention the random knocking on our door during our stay and people coming by and putting room service flyers under the door. It was just a horrible stay and I will NEVER stay at another Motel 6....EVER!!!