Ami15,
I am a current UOP dental student. From my own experiences and from talking to students and teachers, it seems that the best way of getting into UOP are a high GPA (at least 3.0) and good DAT scores. If your GPA is closer to 3.0, study really hard to get that DAT score to at least 19 but hopefully higher. If you get the chance to interview there, you've got a great chance of getting in. According to several doctors and staff close to the admissions process, they will accept about 95% of the people that interview at UOP.
UOP is a school that really emphasizes education geared towards the clinical aspect of dentistry. Their sim lab is excellent, and provides a great way to learn the hand skills that will be needed. They have just added a state of the art classroom and will be adding at least one, maybe two more of these classrooms (the classrooms look like a a small modern theatre equipped with the latest technology needed for any type of presentation). The pass rate for the national boards at UOP is over 95%, and the CA boards is about the same. Currently the clinic is starting to transition to computerized charting and students are provided laptops for clinic and didactic use.
Personally I was impressed with the school and teachers, and the way they presented their material. The doctors that lecture there usually give notes that summarize what students need to learn from a certain chapter or lecture. If the materials aren't handed out in class, the information is posted on the school's website where the student can read on the computer or print is out themselves. This quarter several of the instructors have provided CD-Roms in place of a large syllabus, and this will probably be true for more subjects in the future. The doctors that teach there are all very nice and easily approachable. UOP definitely has some of the friendliest and considerate professors (not all of them are like that, but over half of them are).
The main negative out of UOP is the cost. Total cost of education (not including room and board), is about $170,000 over 3 yrs. On top of that, SF is not the cheapest city to live in. If you rent a room, it'll be about $650-$1000. Studios are about $1000-$1400, 1br apts $1300-1900, 2br apts $1800+.
But with the extra year you get, you'll be earning about $90,000 in your first year if you stay in the bay area to work. Like someone above said, UOP has one of the lowest default rates on their loans, and I think this is due to the fact that UOP not only teaches one how to be a dentist, but they also teach the students how to run a business and handle their finances.
If you have any more questions, let me know.