Hi Jim,
Good to hear you’l be at the Costa Rica conference next week. Be sure to say hi – I’ll be there as well.
As far as the residency application services, I don’t have any personal recommendations there and I don’ have any experience with the particular service you mention. I would recommend asking them for references from past clients or try to find out more about them online.
While at the event, be sure to speak with Roger Petersen or Rick Philps with the law firm of Petersen and Philps. They specialize in expat matters, including residency.