Yeah I've hit a handful of times. (me on the youtube vid)
First time was rough, but that was mostly because I was stiff and not relaxed.
Next couple of times was fine. I would say the landing is as rough as landing Veggie at the bottom.
Keep in mind I am talking about landing this in the second half of the lander as the top half is more flat and quite a bit rougher.
As for speed, like Smitty said hit it all smooth, rail the berm and put a few good cranks in. The landing is a bit busted up from the major rain we had a few months back and no-one has gone in the fix it since so be careful if you are going to try it. Perhaps put some fresh dirt on beforehand.
This step down will be replaced with something a bit more generically friendly in the near future as we want more people to go down that way and use the hip drop at the end.
Since I only know of 2 other people other than me that has hit this (and I am pretty sure I am the only one that actually enjoyed it

) it is obvious that for more people to go down there something else will need to be done.
The plan in the works will be more tricky, but MUCH less big...