If you been to one of the other branches of Gaia then unsurprisingly you'll have a pretty good idea of what to expect. There's a big choice menu as per what many other all vego restaurants in HK offer. Dishes including egg in the ingredients were clearly marked on the menu.
I ate there with someone else. We ordered a couple of sushi type starters followed by a dish that I just happened to like the picture of the menu (the choice when I am so unaware of what many of the dishes are can be slightly overwhelming). My dining companion ordered the taro that is formed into the shape of a fish with accompanying sweet and sour sauce. We also ordered this big plate of crispy noodles served popularly around here with sugar and what seemed to me like a balsamic type vinegar. Nearly all the food was brought at the same time rather than the starter / main courses brought out separately as per what I would be used to in the west.
No issues with tastiness, portion size, service, atmosphere. It was around 360 hk bucks.