I love mine! He's so funny and makes tons of dens in the sand. I was lucky that my LFS wouldn't sell him to me until I made a top and showed him a picture of it. He's my favorite by far!
Make sure you have a lid.
Make sure your rock work is stable and resting on the bottom of the tank, not just on the sand.
Have deep enough sand to allow him to burrow.
Keep favorite corals higher up or else they will have sand thrown on them.
They will take small frag plugs from the sand bed and use them in constructing their den (whether they have corals on them or not lol)