I've been with SMP for a few years and Im always asked by new authors/authors who've come across them how I like working with them.
I haven't had a negative experience with them so far. Their editing is on par and their covers are gorgeous! Im always complimented on my covers. Debby, the owner is lovely and very supportive, but she is understaffed and takes her a while to get back to emails. They seem to be doing well, which is good, and growing. They have changed a lot since I joined in 2012.
The only negative thing I have to say, like other SMP authors who've commented, is the lack of marketing. You are encouraged to market yourself to make sales. Ive done blog tours and that seems to help. I received my royalty check in early Jan and it was a surprise! SMP is working on improving their marketing and they are aware of it. I like working with them so I hope this improves soon.
For the POD side, as the contract states, the author will receive 15 odd copies of their books 9-10 months after release. I have 2 print copies now which Ill probably do giveaways with. No advances yet though this may change when times goes on. If anyone wishes to know more, please feel free to PM me.