I think that's more to do with who you game with rather than the rules ... 
I was wondering what makes it different from other rulesets
Not always, I played with WRG Ancients rules back in the day and they'd suck the life out of you faster than Dracula supping on a virgin, no matter who you were playing against!

I feel a bit like one of the blind men describing an elephant, as I haven't seen the current rules, just the older freebie Empress had on their site. They don't so much add anything, but reintroduce some quite old concepts. IIRC Paul based them on the old 'Charge' rules, with considerable additions. While you couldn't say they were by any means a simulation, they gave a good game, to which, as you say, with the right opponent(s), could give a few hours of good 'old timee' fun. Sure there were more holes in the rules than in Emmental cheese, but that's not all that important to some folk.
I'm sure the rules have been edited and polished since then, nice pictures added and what not, so I'd guess they are a bargain at their price. Expect (and correct me folks if I'm wrong) I Go - You Go turn sequence, movement, shooting, hand to hand and morale, some quite simple and straightforward vehicle, aircraft and artillery rules, and some guidance on formations and organisation... and I'm guessing the use of average dice somewhere along the line.
I've yet to hear a bad word said about them, which is always a recommendation to me...