I only had a few minutes to check it out on Sisi last night before the server went down for downtime, but I'd only messed with it for thirty seconds before I found an excessively aggravating issue:

The new inventory window's minimum size is way too damn big. It doesn't fit into the way I've laid everything out on my screen anymore and there's no possible way to make it fit. The only thing I can think of that might be causing this is the increased size of the capacity bar and the addition of "interesting" but in most cases useless information. I mean, cool, I've got 3642 different stacks in my cargo supposedly worth eleventy thousand ISK. The former is somewhat useful most of the time. The latter, not so much. I don't trade, and I don't haul that much - I generally don't give a damn (or, for that matter, even want to know or think about) about how much ISK I'm carrying in my cargo hold.

I have my cargo open in flight for two reasons and two reasons only: keeping track of what ammo I've got left, and how much space there is for loot. In almost all circumstances I do not need any other information out of my cargo hold; the small and unobtrusive window in the corner of my screen is more than sufficient for me. The new inventory system will, effectively, ruin that idea because I can't make it small enough to be unobtrusive - and as a result have to decrease screen real estate that I'd rather use to look at the things I'm shooting at - not various bits and bobs I don't need.

If you need an idea of how small I want this window to be, go on TQ and open a can or something with the large icon view. Now set it to its minimum height, and the width necessary to show three stacks/items side-by-side - with a scrollbar, in case you have more than three stacks. That is how much space I want my cargo taking up on my screen. I don't need it to take up more space than that, and in fact I do not want it to take up more space than that.

That aside? It's great. I love it and want to mess with it more. But for the cargo of my active ship the last thing I need is all of the extra bits and bobs and doodads that make the window take up lots of space.