We use Concur. As said earlier, excellent user interface. It also automatically downloads all the company card transactions which speeds up entry of those. One drawback of Concur is that you have to use the mouse to click on categories, you can't just enter from the keyboard.

I still use Expensible to track expenses on my laptop. It allows me to search for specific transactions and gives me a good history of past expenses. Concur has limited search (as far as I know) and my company hasn't implemented the off-line capability. It also loses past history with each upgrade. Sadly, I can't transfer entries from one to the other, I do it manually.