Opinion about libraries

Hi guys,
I bought a GSM shield more than an year ago. It is the shield sell by seedstudio, which is based on sim900. now it is it on a arduino mega.
Actually I'm using open-electronics' library and I'm considering the idea to use the official library(changing something like pins and bootstrap of the shield).

does anybody work with both library?which is better in your experience?
thank you for your comments :slight_smile: