Ahh Train. I have a soft spot for this place. I've been going here since I was a kid when it used to be downstairs with weird fish tanks and greedy floors. Since then they've moved upstairs, got a whole facelift and modernized everything but they decided to keep the grease floors.
Food here is not the best and there are better places in Toronto like Pho Linh and Pho Tien Thanh but it's probably the most well known and best in terms of the Chinatown area. Service is mediocre, sometimes great and sometimes bad depending on how the guys working there are feeling that day. Prices are fair and similar to other places at under $10 per person usually.
Opens late and great for groups. Most people don't need this review because they know about train but for those who are new to Toronto or to Chinatown then this is a good start. Just know that if you do decide to go at night say on a Friday/Saturday then watch out for flying plates or guys with swat gear.