I almost bought one but ended up buying the Motif XF. The keybed and overall construction was so much better on the XF. Also the MOX Series has the sound engine and Digital Converters from the Motif XS Series. I found that the XF had cleaner highs and deeper lows due to improvements to the A/D and D/A converters. So for all those reasons I went with the XF. However if I could not afford the XF I would have gotten the MOX. It is an excellent value and essentially the same exact sound as a Motif XS. So if you are looking for a light weight 88 key synth in that price range you will not find a better quality product.
Joe