Contrary to popular belief, you don't have to be a coffee-swilling hipster to go here (although, at a glance, it looks like you have to).
Generally the service is quite good and yes, it does take some time to make a good coffee. It's totally worth getting the Red Mocha or the Ella here. The straight-up brew coffee is good too.
As far as the wait goes, it does open at seven in the morning on weekdays, and if you are an early-morning type of person you won't have to wait at all. 9-10 in the morning is rush hour at Ella's - be prepared to stand in line (and occasionally remind them about what you ordered)
Unlike other coffee places in the neighbourhood (there are many) the lattes here aren't too strong and the coffee isn't too roasted or oily. I've picked up quite a few bags of coffee here, all excellent. They also provide lactose-free milk and soy milk for people with more sensitive guts.