The solution is scalable so I rate scalability an eight out of ten. 

I'd rate it a six out of ten in terms of scalability. It needed some effort to increase scalability.

I'd rate the scalability of Telerik Test Studio as seven out of ten.

The product is scalable, and five people are currently using it on my team. However, I cannot comment on the number of people using it for other projects and in other departments across the company.

It's quite easy to scale the solution. Currently, we only have three users on it.