I have the Mumak of Harad Statue, which arrived today #395. It was surprisingly light and small (SSW web site lists it at only 10 lbs.); heck the base weighs more.
The #1 quality of this piece is the detailing and paint job. The Howdah (the basket thing that carries the Haradrim Archers) is one of the most awesome accessories SSW has made so far. Strings connect across the howdah and there is even a ladder going up to the Mumak Commander spot.
I also like the base, which has some polystone sand and broken arrows.
And of course the Mumak Head is way cool, great paint and detail on the tusks. You can even see the beast's red tongue.
On the negative, it does not display well next to the 1/6 scale figures and it is rather small. I have it in front of Peter Jackson as Corsair and Haradrim Soldier to make a nice Haradrim Display.
You may not find it worth the $300 retail when you compare to other statues like Cave Troll, Gothmog and Ringwraith on Steed. It is smaller than all of those. I also think the Mumak looks a little skinny, I guess he was starving or something. Maybe a price of $225 to $250 would have been more appropriate. I like the piece, but it was a little costly.
Caution, there are many styrofoam pieces in the howdah with covered twist ties. Once you unpack it, good luck getting all the stuff back in if you ever decide to repack it.
I think this piece is great if you love the Haradrim/Mumak or are a completionist. If you are not one of these, you might want to pass.