Yeah, I'd have to agree with Athos as to its appeal as a chess set. It's a great "battle set"-- and it's got great elements if you're looking to build an army and all. If all those extra pieces got used as part of a landscape and it depicted the clash of the two armies, I'd be totally loving it. And, well, I'm still loving it because it's got some wonderful stuff in there. But it's fairly safe to say I would NOT use this as a chess set. It's way too needlessly busy, and doesn't look like it lends itself to smooth gameplay, the way the other chess sets do.
By my rough count, I get between 1400-1750 pieces, which is *huge* compared to the roughly 250 piece count of the other chess sets (they say 179 and 167, but I think they're skipping the elements of the board). Assuming it's not glued, you're adding a few figs and 1200+ pieces (about $100 worth). I guess by that logic it would be in the $150+ range, but when I look at it and think to myself what I'd *expect* to pay, it'd be closer to $100.
I dunno-- at first I was thinking it'd be a no-brainer that I'd pick this set up. But if it weighs in at $150+, I might have to pass. At $100, I'd buy no problem. $150 starts to get a little iffy-- especially if they offer those battle packs via S@H or in Lego stores!