It's been a while since I've used Goldmine, ACT, or any of the more SMB focused CRM apps but it's definitely not clear why I'd choose CRM Fly vs those products. i'd emphasize simplicity and ease of use—there are a lot of folks out there who benefit from sales tracking tools who simply don't need everything out there.
Would, however, suggest things like XL exports and perhaps consider SaaS opportunities or partnerships around things like invoice printing/automation. If your approach is "simple, easy, helpful" (cause the other guys are complicated bloatware) then think how you can do this end-to-end for whomever you are designing/building for.