I've been coming here at least once a week for a few months now as it's near my work so excuse my biased star rating.
The phõ at Le Tonkin varies from average to good, sometimes a bit on the salty side. My favourite meal so far has been the vermicelli platter with three meats. It comes with an imperial roll and the choice of a nice, light house soup or Tonkin salad for $17. Their calamari comes either as an appetiser or a plate with rice and salad (same portion size) and is decent but a bit over salted. Every other dish I tried here has been average to great with no other standouts.
Service is quick, even during slower periods. A good option if you are looking for a quick meal. Expect to pay 1-2$ more than you would in Chinatown. As another poster has stated, I wish I could give them a 3.5.