There is a (early access) review by Jonathan Savage of the Fenix 5X:
http://www.fellrnr.com/wiki/Garmin_Fenix_5X
The most important thing about the F5 review is yet to come.
I'm waiting for Fellnrn to update the picture with his views on the trueness/accuracy values and see where he places the F5 when compared to the F3.
(dang, got to update the signature, lol)
Did not work :-(last night I started to purchase the stryd but then decided to hold on some personal finance issue. but I had it in my shopping cart and was filling out billing. at least last night the code tfk10 worked. just now after reading your post, I find its not working. maybe being posted here, folks saw it and they discontinued it. Thats a shame. 90% of something is better than 100% of nothing.
His Garmin reviews are suspect until he either starts testing using 1 sec update, or until he presents his testing that proves that there is no difference between 1 sec and smart. Until that happens, his Garmin GPS tests aren't worth discussing. At all.