What is the best way to connect from Netsuite to Magento? There are lots of different developers offering connectors. I presume that they are not all as god as each other.

Celigo is what my customers use. Then you can automate reconciliation in erp

I have used Farapp which was pretty basic and easy to use. The advantage over Celigo is that it was much cheaper (at the time). I believe Celigo is more standard though & offers much more in terms of features.

+1 for Celigo