I can't tell you about Organized Momentum as a customer. I don't own a small business, therefore I don't need help with bookkeeping, organization, reorganization or organizational upkeep. I can, however, tell you about it as the friend of one of their employees.
I can tell you that ever since she's started working there I never see her because she's working such long, hard hours, and when I do see her all I hear about is how invested she is in working with her clients to strengthen and grow their businesses (though of course without revealing an confidential information about the businesses). I can tell you that I've met several of her co-workers, and they are all as out-going, friendly, dedicated and possessed of a sense of humor as she is. I can tell you she keeps getting more clients and doesn't seem to lose any.
I'm sure that Organized Momentum can provide you with dozens of glowing references for their work, I'm giving you the behind the scenes look and there's no smoke and mirrors here, just good, dedicated work.