Obviously the design was aimed to make a line of eyepieces for digiscoping with the Nikon line of adapters ,and for that they are very good..Actually the Huge diameter of the ocular ,intended as a base for the adapters ,adds stability to the camera,and I am sure this was the idea behind the shape..I like the DS eyepieces alright, got used to their shape,and found them good for digiscoping ,but for the main use I gave to my scopes, observation and field sketching, they got in the way at times.
Without caring too much about accessories either , I like to put the covers in the scope and toss it in my backpack when im moving around in the field..I like to do it as fast and easily as that simple operation could be done ,sometimes in cold mornings with my gloves on and with cold fingers..Is a simple detail ,but the cover of the DS eyepieces is Hard to use,adding to the Visual-Use unfriendly design..... IMHO