I use these shirts for camping, construction, gardening- anywhere I want sun protection. Usually I wear ExOfficio Airstrip Lite shirts, so this is a comparison:

Pro:
- This shirt looks much nicer than the ExOfficio. You could wear this into town/dinner and look decent. The pockets don't bulge out and look baggy like ExOfficio Airstrip.

- Columbias fabric is nicer, as is its color selection. Fabric is softer
- Columbias fabric seems tougher, like it wouldnt rip as easily. On the other hand, its warmer. On a 70-degree California morning, I could feel the sweat starting up (I was wearing a dark red shirt)
- the Columbia pockets won't hold as much as Ex Officio because they are not gusseted. The Columbia pockets are sewn on one corner, making it harder to get a full opening to slip something in.
- ExOffico has more ventilation and is cooler
- Columbia has no zippered secret pocket. ExOfficio has one, conviently inside the chest pocket.  My iPhone 6 will fit in their zippered pocket
- this Columbia Lite has no flip-up collar like ExOfficio Airstrip Lite. That has saved my neck many times

Bottom line: if you want a nicer looking shirt and don't mind a bit more warmth, get this Columbia Silver Ridge Lite. If you want maximum coolness and pocket storage, get ExOfficio Airstrip Lite.

As for fit, this is a generous-sized shirt. Usually I wear XL to get sleeve length, but the sleeves and shoulders were a bit too long. Not long enough to bother sending it back, but next time Ill get a large.