Truly old-school
First of all, you need to install a patch to work it in XP. Now, graphics are old-school 256 bit style so dont expect much for todays standards. Keep in mind it is a veeery old game. I assume it was great in its time, but it is not now.
Sounds are great. Truly, they are not obsolete even today.
Game play is easy. It is highly intuitive. However, there is no grand campaign which is the biggest flaw about it. You play scenarios, one after another. No resource management, no units management before battle. It is a 1997 model game, so does imperialism but imperialism lives up today, this game surely not. I compare them because they are games of Same generation, Even 1996 model Master of Orion II is much better by means of graphics, sounds and gameplay. Eventually, i would definitely prefer imperialism or MOO2 over gettysburg..