Toddler's First Swimming Lessons - Where Do You Go?

My son is going to be two in September and with that it's beyond time for him to sign up for swimming lessons. 

After a year and a half, the little boy who hated the bathtub and water in general, now loves his tub, loves his baby pool and loves spending afternoons in his grandparent's in-ground pool.

That being said, the ever present guilt of ensuring he only gets the best possible experiences has me debating the best place in the area for swimming lessons for my little tyke.

So, Wilmington area residents - where do you or have you sent your little ones for lessons? 

I've looked at the Burbank YMCA in Reading, along with the Boston Sports Club in Woburn, but can't decide and need your advice. 

Thanks in advance for your help!