A few weeks ago I was in urgent need of a check-up and hadn't been to a dentist in Taiwan (or even a doctor for that matter). Looking through the list here it seemed to me even the recommended places had some negative comments, and some people posted denouncing small practices across the board for prioritizing money over patients. Since I don't live in Tienmu and I don't think I've even been up there before I was looking for something in a familiar area to me. I was looking for top Western-style care and dentists I felt comfortable with and could trust.
A little more research lead me to Taiwan Adventist Hospital on Bade Rd. (near Taipei Arena) and it ended up being the best choice for me. Zero language barrier as everyone I dealt with spoke great English. Most of the dentists are credentialed from abroad. They took X-rays for me, did a cleaning, and inspected my gums and a cavity. The dentist had good candor and answered questions I had about my situation to my satisfaction. In fact, she opted NOT to drill into a cavity as it was too early to treat the tooth. Reading some other stories on here I can't imagine the smaller practices would react the same way. So I was grateful to be at a larger institution at the moment.
Yes, all this came at a price, probably the most expensive place to get dental work is a hospital. Total cost for me (including prescription mouthwash) was $90USD. So this option is not for everyone, but if you want familiar Western-style dental experience with no confusion or surprises, it's a great choice. Personally, I just want the best care regardless of cost.
There is also the Primary Care Center which seems to give the same type of care if you need to see a doctor.