There's a bit of difficulty with scaling when I want to generate 10,000 concurrent users. For medium capacity, it works very well. If you are using an extreme user load, then I think the location of the load generator needs to be looked at more.

We have 15 to 20 people using this solution in our organization.

The solution is scalable. 

We've had no issues with scalability.

The solution is very scalable. For the field test, we have over 1,000 users. As of right now, we don't plan to increase usage.

We sometimes encounter scalability issues.

We haven't had any issues with scalability.