Russ is correct about compatibility. In "the old days" it was virtually impossible to find anything else that was compatible with MS Office products, but these days that's no longer the case. Why not try one of the free ones first? All it's going to cost you is the time to download and set it up. If you don't like it then you can still pay (

) for the MS stuff if you want to.
Softmaker, the company I referred to, have paid versions available too which I suspect virtually guarantees full compatibility.