Good learning opportunity
My preschooler joined Dynamo 3 months ago (this summer 2007) and I must say - the teachers are very friendly to my kid. My son actually feels comfortable in the water. My goal was to have him be comfortable in the water and then learn actual swimming.
I would, though, say - its better if one uses private one-to-one sessions than in a group, for actual learning to swim. Right now, my preschooler is in group session but after this session I will definitely put him in private one-to-one session so he learns maximum.
The group session is OK for any kid afraid of water and trying to get comfortable in water, because the kid actually sees other kids enjoying as well.