Mpc 1000xlcd V1.4

I noticed that my mpc has V.1.4 and there is already V1.28 should i upgrade? I havent had any problems with the version im using right now.

Let me know if it is a good thing to upgrade or not.

Forgot to put that I have the mpc 1000 w/ Xlcd

I don't own it, but I see the latest free os 128 (bundled with xlcd screen) is ver 1.04.
This 1.28 you see, is 128XL os, and it's 98$ upgrade. What the difference? night and day, 128 it's just regular free jjos resized to bigger screen. 128XL has all the jj voo-doo and what not.. http://www7a.biglobe.ne.jp/~mpc1000/chart.htm