For a blast from the past, try the Gilmore Restaurant. It actually makes you feel like you're back in an old Canadian Chinese restaurant from the 70's/80's. With that said, the prices are very decent and probably still comparable to those from the 80's, and the portions are huge for the price you pay.
If you're looking for cheap eats, this restaurant is consistently listed in the Province and the Burnaby Now for Cheap and Decent. If you haven't tried it, I would recommend any of the lunch specials that run from $5.50 from 12-3 on Monday-Friday. Their weekend specials are not bad either and you get a soup or salad with the specials.
The dinner specials are not bad either. It's the only place where you can still get a 6-10oz steak for less than $14.
As for the service, well it's family owned and operated and they work hard at it. So cheap and decent would best characterize this place the best.
I give the food a 2 because it is decent/solid in my opinion. The service is good and I'm served very promplty. Value wise, for $5.50 for a burger, fries and soup, I can't really beat it anywhere else. And a steak dinner for less than $14 is still hard to do anywhere else these days. Ambiance rating of 3 is because the furniture, booths, tables and chairs are dated...from the 70's or 80's. It's kinda like being in a restaurant from the TV shows Dallas, the Duke's of Hazzard or Knight Rider.