I used to go to Dr Mahon before he went to his own practice and I was thrilled to find him once I moved back to Las Vegas after having been away for 4 years. I've had my teeth cleaned multiple times at Siena with 3 different hygienist on staff and they were all great. On time, caring, informative. I have also found Dr Mahon to be the best Dentist I've every had. I've moved around in my lifetime several times and I am glad to be back with Dr Mahon. Over the years he has done various dental work on me (filling, crowns bridges) and every time carefully explained and showed me what he was doing and why. He has made sure that I was never in pain. His office staff has always been nice and professional.