Kippt is generally great and I've been using it regularly since signing up, but the interface is just awful. I don't want to see my links as a weird Pinterest-inspired grid or a ridiculously low-density list. I want an actual list, with a reasonable amount of white space. I also want a way to go straight to the link and bypass the link's page within Kippt.
Basically, putting things in to Kippt is a pleasure. Using the information once it is in Kippt is a painful experience. I find myself dreading actually going into Kippt to get at a link I saved previously.