I've been wearing Tilley LTM6/5 hats for many years and have found them to be a great deal since they are so well-made and the fit has never failed me. I had a 4-year-old LTM6 hat brim lose its shape and Tilley replaced under their lifetime warranty. Unfortunately, they didn't have the same color (natural green-to me its yellow) in any of their inventory, so I had to choose another color or hat. Since I have several LTM6's in other colors, I selected an LTM2 since it offers an even wider brim.
The hat arrived a few days later and the first thing I noticed is the brim is really wider than the LTM6, which made me very happy since I have very fair skin and need the extra sun protection. The second thing I noticed is the hat crown is not the same shape as the other hats I've owned, it's rounder and doesn't fit my head like the more oval shape I've been wearing. Therefore, it doesn't feel as secure on my head as the LTM5 or 6. There was no mention on the website that the crown shape was different or even mention of its shape.
If this hat had the same shape, this review would be 5 stars, but for me, it only gets 4 stars. I will be calling Tilley to find out if the one I got is supposed to be round, and if so, I can only hope it conforms to my head over time.