This is a really good map, challenging, stategic, fun, all the things that make a map great. No bugs, no problems, no complaints. You have a few options when attacking, and your straegic skills are pushed to the limit when defending! :)
On normal, attacking is pretty easy, for I killed the lord with my archers! Though, defending is another story-it requires you to think before you do anything, the type of map I think is enjoyable.
I like the way you designed your castle, with the enemy having to come around that defensive tower. You placed just the right amount of troops, (though a little more archers wouldn't hurt!) and created a very interesting castle.
Map Design: 4
Very cool terrain detail, little bit of eye candy, which adds to the experience. Cleverly designed castle, like I mentioned above, doesn't allow so much ease in the defence of the castle.
Like you said, just a simple siege.
Put together, this map is great. The terrain, the castle, the strategy, everything, in this map, works out very well. Good job!