So far I've found the mechanics pretty easy and able to produce exciting combats.
As a brief example, in our last session the party (5 3rd level characters) was trying to track down a gargoyle, both because it had a bounty on its head, and the PC's had a buyer for gargoyle horn.
The finally found it perched on the top of a warehouse converted into a tavern. The monk and the rogue had point and were a ways ahead of the other and they decided to find a way up without waiting. The warehouse had a ladder around back, opposite the side that the gargoyle was on. However, it was cold, wet, and slippery that day and the rogue slipped as he got to the top, alerting the gargoyle.
As there were only two PCs apparent, the gargoyle decided to fight and was giving pretty good. He took some damage, but neither character had magic weapons, so it was halved. Still, he probably would have flew off, but the monk managed to get a rope around him, hoping to keep him there, till the others arrived.
The other three characters reached the building, which was 30' high and were in the front. They decided that the fighter, with his strength enhanced (I forget what they used) would climb up a drain pipe with the smaller characters on his back. They found the pipe too slippery and probably too fragile, so they had to try to get around to the pack.
In the meantime, the gargoyle had two friends in the form of a pair of gray dwarves who arrived to meet up with him and were approaching from the rear. The characters on the roof could see them, but not the ones on the ground.
After a few rounds the rogue is almost to 0 hp, the monk is hurt, the gargoyle has not been able to free himself, the gray dwarves realized something was up and go invisible, and the three PC's on the ground are just below the combat.
The monk gets the end of the rope to the fighter, who tries to pull the gargoyle to the ground, but only succeeds part of the way. The dwarves attack, now enlarged, the characters on the ground.
The next round, the monk jumps off the roof and manages to land on the gargoyle's back and they are able to get him grounded. Now with some spellcasters available, they knock the gargoyle out and one of the dwarves. The other dwarf flees into the tavern, presumably for reinforcements. Before the reinforcements can get there. The characters scoop up the gargoyle, leave the unconscious dwarf alone, and high tail it to the closest place the gargoyle can be held and they can get the bounty paid.
So this was not an earth shattering, epic combat, but the combination of description, some weather factors, the location, and saying yes when the PC's want to try maneuvers like lassoing the gargoyle and leaping off the building onto his back made it exciting for everyone. And it was fast moving as well.