Nice to see that companies are paying attention to Steem ecosystem and are willing to make it even better.
In most cases you don't have to parse entire chain to get data you want and can query RPC methods (https://github.com/steemit/steem-js/blob/master/src/api/methods.js) but it is still pretty slow (700-1000ms) and not very flexible.
SBDS is way faster (100ms at most) and you can do basically everything with it.
Looking forward to using it at Busy!
Keep up the great work!