We did 1 at 2 days and haven't been back. I am changing my kids Ped. We will be seeing the new ped in 2 weeks. DD will be 3.5 months. I will not be vaxing at that visit, so we will then schedule for July (6 months) and I will have both my kids seen on the same day - DD for 6 months and DS for 3 years.
For us, well baby/kid checks are important, but I don't do them every 2 months. My DS was very ill, and we never saw his ped b/c we saw his surgeon every month for the first year. The surgeon asked all the same questions and such, so, we didn't feel it was necessary. Our old ped was so nonchalant about EVERYTHING that I just didn't trust them anyway.
Anyway, I hope that helps a bit. For us, we feel it's necessary. I couldn't forgive myself if there was something wrong, and we didn't catch it.