I have descended gully A twice. Not very fun, but part of the adventure for sure. I think we did at least two rappels. Gully B and C do not look very inviting from the top. Descending either of those is a story I would like to hear.
I descended C twice. The first time coming off of Solar Slab, the second time coming off of Black Orpheus.
What I liked about "C" :
Immediate relief from cold, brutal winds if suffering on upper slabs. I was freezing and knocked down twice by the mean winds on the upper slabs and had to crawl on my hands and knees to gully(ouch).
Single rope descent.
One of the most beautiful gullies I've seen in Red Rock.
Fun downclimbing and scrambling in between short raps.
If moving fairly quick, can get down to Solar Slab terrace in less than an hour.
No crowds.
What I didn't care for:
The ratty rap anchors. Pretty much most of the rap webbing could use replacing.
You'd drown and/or get swept away if caught in the narrow, steep gully in a sudden rain storm.
The first time my partner, and I did the "C" gully, it had snow for quite a ways down (maybe 6" to one foot deep), a little bit of ice, and some small pools of water , but wasn't too bad. We just had to watch our footing more.
It's easier to locate the gully from atop Black Orpheus; Solar Slab a little trickier.