If you have a mold issue, don't over-analyze it. Go with MoldGone. We worked with Joe Mulieri, the owner, and were very pleased with the outcome. Joe presented himself very professionally, and used no high-pressure sales tactics. In fact, on his initial visit, he was describing how I could go about dealing with the issue myself, without paying MoldGone anything.
Joe's crew came out to do a full surface cleaning and encapsulation of risky areas. Then, Joe (or his son, Mike) came out for several follow-ups when we asserted that the mold wasn't gone. Without any hesitation or additional cost, they came out on several occasions to do things such as temporarily setting up an air scrubber, identifying items that should be discarded, recommending follow-on remediation options, performing an ozone treatment, and taking air quality tests. With each visit, Joe patiently answered questions. His passion for the subject - and his business - is evident.
Oh, and I'd be remiss if I didn't mention that I got three quotes and MoldGone's was the lowest bid.