We implemented the solution ourselves and manage it in-house. 

The implementation and configuration with AWS was straightforward and simple.

I had a professional team do the implementation.

I did most of the CSR deployment by myself, although when it comes to the LAN-related work, I had assistance from the LAN team.

One to two people are suitable for handling the maintenance.

The Amazon team helped us implement the product. It was a good experience. It work now.