For the record - I can tell you that there are two SimplyLife cafes, since I ate my lunch in the other one, in Cityplaza, today.
As a much much shorter review: The food was pretty decent - not stunningly good, but good enough that I'd go again. The service, on the other hand, was not particularly good. I was eating with a Chinese colleague, and we both had the onion soup and iced tea, I had the pesto pasta and he had some chicken. He didn't get the tea he'd asked for - it came hot, not iced - and I'm not sure if I got mine with sugar or not, having asked for it without. We waited a few minutes for the main courses, until mine came. After waiting a few more minutes, he asked the waiter where his was, and then a few minutes later, I asked where it was. I don't want to sound like a brash expat, but... when I ask a waiter in a restaurant a question in English, I do not expect him to turn to my companion and reply to him in Cantonese without a word to me, even if the question was about my friend's food. At the very least, I would expect a Sorry! to me, then an explanation to him. After the meal, my friend pointed out to the waiter that he'd been rude to me, and he apologised. The apology may have meant slightly more if it hadn't been... to my friend in Cantonese, rather than to me in English.
Those who know me will know that I'm not someone to complain at a lack of English - I'm generally pretty impressed when staff in shops, restaurants, etc. make a genuine attempt with their English, when it's obviously not easy for them. If nothing else, their English is (almost?) always better than my Cantonese. I am insulted when a waiter won't even speak to me, in a restaurant whose menu is mainly in English and which is still on HK island, even if a bit out of town.
Sorry, this turned into a bit of a rant. Summary: food good but not great, service bad but not appalling.