Works for me. Just stumbled across this thread today, because Ive been looking for a new seed for ages. I entered in creative mode just to see if it was worthit. It has a huge jungle biome and red sand biome, along with spruce, oak, etc. Lots of other trees. Spotted a few giant mushrooms. I checked out the swamp water at the south end, and built a platform and got some small slimes to spawn during the night. I then tried find on of the libraries someone mentioned above, couldn't find it but I I'd stumble on a large system of mine shafts underground. Followed those around looking for a cave spider spawner, but while I was looking around I heard the splat sound of a slime. Found a big slime down there. So if if that swampy bit doesn't work for a slime spawner, at least there is a slime chunk which I plan to use.
So I decided it was worthit and I generated a new survival map. Made tools, found melons, etc. I went into a cave, started mining coal and got hit in the face with a poison potion lol. The witch chased me out but i killed her. Anyways...I have coordinates all of the above if people want them. I'd give them now but I don't know them off the top of my head. It's a good meal so far. Oh, and also I found a ocean monument/temple thing when I was flying around in creative. It's in the extreme top left corner.