Thoughts on the Big 5:
Food: You can't find food like this anywhere else in Hong Kong. The food at The Joomak is all Korean-style, so you can find sweet and spicy rice cakes, fried 'chicken', sushi with pear (surprisingly delicious and super refreshing), and 'beef' rice - feel free to click on each image for a more detailed description of the dish! I love the food here, and it's amazing that the restaurant has managed to create a fully vegan menu out of one of the most meat-centered cuisines (they still offer meat dishes, so it's perfect for occasions that involve both omnivores and vegetarians/vegans), and it is solid evidence that eating vegan food does not require any sacrifice. They also have a vegan free-flow on Wednesdays - $198 per person for 90 minutes!
Price: The food here leans more towards the expensive side - no doubt pricier than small shops on the street selling Tteokbokki and Kimbap. You can get appetisers for $50-$100, mains for $80-$150, and desserts for $50-$100. As a reference, everything in this post added up to around $500 HKD and would be able to satisfy around three people. [I was granted free spending on all these items, however, this is not a sponsored post!]
Location: The Joomak is located in Harbour City - a two minute walk from the Star Ferry pier and also nearby the MTR station (Exit A1). It's conveniently placed in respect to the rest of Tsim Sha Tsui, however, it may take awhile to find once you enter the mall - you will need to go up a few flights of stairs/escalators, walk a few corridors, and make a few turns until you finally find the restaurant.
Environment: The restaurant itself is quite large, meaning that it's not a very noisy atmosphere and easy to have conversation without being disturbed. Nothing in particular about this restaurant stands out as not being environmentally friendly; they don't advertise themselves as an eco-friendly place, but the only real problem is their plastic straws.
Service: To tie this in to the previous point about eco-friendliness, although the waiters are always ready do their jobs, on both times that I ordered a drink and requested for no straw, they still gave it anyway. I'm not sure if this is because they are more proficient in Chinese and less so in English, but there could definitely be some improvements to the service overall (just basic communication things).