The Malvern is a weird one on the 1 last, it was too tight for me in the toe box and I returned it. Going down in size and up in width had too much heel slippage. But the Shelton, Leeds (shell & calf), Wilbert (brown & black), Dalton, Bradley, Bayfield (brown & black) all fit me fine in the toe box. However my Shelton's are older and someone posted not long ago that he had replaced his older Shelton with a newer pair and the newer pair was tighter in the toe box. So I think at least some of the #1 last shoes are going to vary, depending on the model. The Malvern is definitely the tightest toe box on the #1 last that I have seen. Ordered the Katmai in the current sale and they should be at the house tonight, my main concern is that they are modeled too closely to the Malvern in fit.
Interesting that everyone says the toe box on the Malverns is tight. I have found it to be the exact opposite and to have at least as much room in the toe box as my Park Avenues and Strands. As for my 8 last Delray's, there is no comparison. The 8 last is really tight in the toe box.
As for the heel slippage, I found that it was really extreme for the first few months of breaking the shoe in. I originally attributed it to the 3 eyelet lacing, which does not allow you to cinch the shoe to your foot as tightly as other AE's, but now realize it was this and the fact that the sole was very stiff and not flexing. Now that I've been wearing them once a week for 4-5 months, I've noticed that I get no heel slippage.
One of my favorite shoes that I wear with jeans, wool slacks and even sport coats.