The small negatives but which are related: not recommended for giant and giant (over 175 .. 180 cm mini), under penalty of pain in the kidneys in vertical position (I measure 1.70 m, and it is OK for me I not bend down, or just a few cms maximum); not recommended for hiking perhaps, or the high mountain because it would break (but super OK for concerts or other stage activity: it is my personal use), a carabiner perhaps a bit light, which could break in long (it would have taken a small mouskif like rock climbing).
But for now, REALLY VERY SATISFIED!
With excellent service and AMAZON THE POSTAL BANK (it has to be better for me in my opinion).