OK for English
Yes, my daughter's been going to the Tin Hau one for about 7 months.
I do believe the kindergarten is a properly registered one, but BB is just a playgroup essentially.
The 2 hour session is broken down into lots of 10 minute-or-so slots - story time, free play, snack time, arts&crafts, singing, etc.
Once they are 2, they can move up to Letterland. I'll be moving my daughter at 2, as I want her to learn Putonghua. BB & Letterland is English only. Almost 100% of the parents and kids are Chinese, so it seems to be popular among families wanting exposure to English where there is little/none at home. This is not my family situation, hence the move.
You can enrol your toddler in a trial class. However, there seems to be a lng waiting list. Probably a refection of the reasonable fee.
HTH.