My son went there at 2 and he enjoyed it initially. The classes are small because its run from home - 6 kids which is great. But in hindsight, he did much better at ESF kindy in a bigger class and I wish I had put him there earlier. We started Kindy at 3 1/2 instead of 3. The problem with a small group, if you don't have a good mix of kids, then a child may end up being left out, and not socializing. At a regular playgroup, the chances are higher your child will find a friend, and also the activities and facilities are much better.
My 2 cents