Jim,
About how big is the company? How many manufacturing employees do they have?
We did jobops for a number of years (and still have some clients we support), but found that it was only viable for companies already dedicated to mas90/sage 100 for life. It's not remotely competitive for 'net new' opportunities where you aren't selling to a controller who used MAS90 at his/her last job.
It does mostly what it says its going to do but if the client is serious about optimized manufacturing processes and needs functionality like truly integrated quality control, true MRP, multiplant scheduling, visibility into materials movement while in production etc, than solutions like Epicor or Syteline are much more viable.
Full disclosure, we are also Epicor ERP partners.