This has always been a really interesting topic of discussion, whether or not sweating is an indicator of a good workout or not.
The first thing we have to do it determine what are we qualifying as a "good workout" and then we have to figure out how sweat plays a role in that.
No matter how we break this down, the fact remains the same, the function of sweating is to thermoregulate our body. This simply means that when body core temperature increases, the body begins to release fluid via the skin in hopes that convection will take place. With that being said, some have made the argument that you have to exercise enough for an increase in body core temperature to increase enough for sweating to occur.
However, we know that if someone is deconditioned, they will experience sweating early on. We also know that some people just sweat a lot without exerting themselves much.
Bottom line: sweating is not a way to determine whether or not your workout was good or not.....unless your only goal is to sweat a lot.