nice...but I'd prefer a side loading gate myself..
The end tube has only an advantage when loading the first time, loading one round for a follow up shot, should you happen to be hunting with insufficient cartridges in the tube, is gonna be slow.
How often will that happen? Probably not very often.
The side loading gate wins hands down should it occur however, and the top loading capability of the '94 Winchester is even faster.
It does however have it's own advantages, and disadvantages to consider.
The removable spring tube assy is typically not easily taken down for cleaning. in fact, it's usually designed NOT to be taken apart. If it's maintained, and oiled regularly however, it's not an issue.
It is heavier by design.
The only one I have experience with of this design are the Cooey rifles.
In them, it was possible for the tube to fly out the end if it was bumped while hunting. Admittedly, the Cooey used a very simple catch at the tube end, and modern rifles use a better (IMO) system. Still, it is something else to go wrong.
The closed receiver on these rifles will appeal to many. It doesn't allow much dirt in.
However, like a Marlin levergun , or a Winchester '92, it doesn't allow much dirt to leave either. It will need to be kept clean. That's not a problem for a dedicated gunnut, however, for the hunter, it can be an issue.
Enough negativity. I'd love to check one out.