Although the learning curve is a bit steeper than expected, the DevExpress Universal suite is something unbelievable in terms of productivity and realiability. The documentation is huge and the demo apps are very helpful. Something to point out: even though there's a lot of code examples - maybe it's just me - but in my unlucky experience I never found an example who did what I needed. The search for a solution in some cases is very expensive in terms of time spent. You have often to ask to the excellent customer service because sometimes what seems the most logical and obvious path to do something is the opposite way to reach the goal. Anyway, the huge amount of "ready to eat" components evens the score.

Very good component inventory, excellent support.