Sprout Financial business credit/Lines of credit

[John Crider]

I’ve been looking into working with sprout financial. I’m finding mixed reviews online but most of those reviews are about credit card stacking. I’m being told by my rep that they have changed their structure and no longer do CC stacking to obtain funding. Has anyone worked with them for non PG lines of credit? 
Im being told for a fee they will “review/repair/build my business credit profile to be able to get funding.”  
Is this service legit and beneficial?