I had the same experience with JobScan. I felt that it helped me on my resume overhaul with some good clear suggestions, but didn't work well with editing and replacement, especially with my resume hosted in Google docs. I cancelled my subscription during the free trial.
Thankfully, this is another tool in the current arms war of job searchers versus corporate recruiting.
Thankfully, this is another tool in the current arms war of job searchers versus corporate recruiting.