Rhino....I won't dispute that you may have had a problem with Rocky Smile.....
However, I had a crown put on several years ago...probably 9-10, by an old time Navy dentist who is located behind the La Curva restaurant. The tooth was a back molar, and it was cracked (vertical crack). In the states, the dentist would have extracted, and it probably would have required an implant. This tooth and crown are still going strong!!! (knock on wood!!). So each case has to be taken individually.....
With Rocky Smiles, I would feel comfortable having Dr. Acuna working on me....but not necessarily one of her associates....she did some work on my mom, but was not the most gentle, although the work was acceptable.