I've been going to Luckies for about 15 years now and I must say its one of my top 3 picks for Hakka food. They have two locations both alongside Lawrence Ave. East (Golf Road & Midland Rd.). However, I would recommend trying the location on Midland as I have had better luck with them in the past few months.
Food- Luckies tends to be one of the more spicier Hakka restaurants that I have been to in comparison to other Hakka restaurants. The food is tasteful and the portions are HUGE. My favourite dishes are the Chilli Chicken, Manuchurian Chicken and the Schezuen Shrimp. Each dish comes with a bowl of steam rice as well. However, if you order additional Fried Rice be warned that it's a LOT. 1 Fried rice is a little less than $8 but will fill up 3 people easy. Definitely recommend any of the Manchurian fried rice dishes over the regular fried rice.
Service-Average service. To be honest I wouldn't expect anything more from a Hakka Restaurant. The food is generally ready within about 10 mins.
Also, if you pay by cash they reduce the bill by about 15% (I think this is only for take out items though).