[hipsterrific]

Telerik wasn't half bad when I was the only .net developer for a hospital system with 3,000 employees. It made short work for me since building AJAX-y controls meant less time building business rules.

The controls are really bad, they produce a lot of awful JS. Also, with newer frameworks such as angular, knockout, ember, et al...building reusable JS components got simpler. I haven't yet used KendoUI but haven't had a need too, building my own was far more fun (and with OData, not that much time either).

I did use their reporting product a lot but even that was too heavy and cumbersome.