I am an addict of those larger terminal eight descenders as they allow you to tie off ropes and even pass knots wherever ropes are joined with very little downside, as others have noted. the fabric is light-weight, however it's a small amount heavier than a regular eight which can increase your overall weight. Still, its skillfulness outweighs the limited further weight in my opinion. In all, a good larger eight descender, that I received for an easy review.

Specification 
Material: 7075 Aircraft-grade Aluminum alloy (anodized) 
Hot Forged 
Standard Finish: Anodized 
Breaking Strength: 35kN / 7700lb 
Size: 16.8x17cm / 6.6x6.7in 
Weight: 270g / 9.52Oz 

Best Rock Climbing Belay Device