I like how easy it is for me as an owner/builder, not having any experience in this area but hired someone who has been using them since they started their business over 10 years ago! The best part about Autospeccs was being able realize what we were missing from our own documents which saved us time & money when submitting permits!! There are no downsides at all really just wish there could be more options available if something wasn't listed or didn’t fit my needs so easily then i would have had issues finding another option (but maybe thats because its such great software).
We use autospec's mostly during permit process where everything can get lost due too many people involved - especially subcontractors sometimes forgetting things needed by inspector etc..