They based on the Mighty Armies: Fantasy rules formerly from Mongoose. Basing is 2 inch frontage by 1 inch depth (although any similar will work fine). All movement, combat etc is resolved by stand, so the number of figures per stands is irrelevant. Standard table is 2x3 feet for 15mm figures.
The mechanics are very simple, about as complex as DBA.
The highlight of the game for me is the build your own army system. Troops are rathed as light or heavy, raw through veteran quality,and given special characteristics to reflect special atributes such as javelins, warband etc.
The armies are not always balanced. Currently an all heay cavalry arm is a very effective ool for crushing all resistance. The developmnt team are working on correcting this. The best practice for developing army lists is to be guided by history and not play with min-maxers.
I have the pdf verswion and it is not overly long to print out.