Siemens Sinumerik 840D Generic Post - How Good Is It?

[jonathanBUCVS]

To anyone currently running a similar machine or using this generic post: how good is the post as-is for your specific machine? Did you have to make a lot of small edits to customize the post for your specific machine, specific M codes, etc., or are these controls more standardized than Fanuc? 

I realize this is a very subjective question, so any insight would be helpful. I am more interested in the generic responses than on tailored to the specific machines we are looking at. 

We are looking into a new 5 axis mill with a Siemens 840D control. I am not afraid to edit the posts when required, but have no Siemens experience and want to make sure we can at least get running 'out-of-the-box'.