I have a 16' X 5/8" steel core with double-ended swivel snaps, running on a steel core prussic also with a swivel snap, and a micro-pulley for one-handed slack tending. If I get into a branchy conifer that I could pretty much free-climb, which we have tons and tons of, I pop the pulley off, centre the prussic and use it like two 8' lanyards for safeties as I go.
Yes, It's a heavy bugger, but there's nothing like a beefy steel core for flipping up the trunk of fat, rough barked Douglas Fir. It has it's place.
I don't always want that encumberance, so I have a 10' rope lanyard, 1/2" Samson ArborMaster with BeeLine eye2eye, VT/Williams/Petzl Fixe, Steel snap/thimble/Double Fisherman's/whipped. Nice light short work positioner.
Set up the same way, but with an unwhipped 'biner for ease of later removal, I have a 40' ArborMaster lanyard, really a second climbing system in a ditty bag that comes out on crazy long limbwalks, I'll sometimes set it where I'll need it on an overhead limb, come down and gather/ attach it for triangulation on the limb walk. Very handy on slippery, mossy, wet Garry Oaks we have around here, very similar in structure to the Live Oaks many of you have to the south.
I've tried the Petzl Grab on steelcores, really wanted to love it, I tend to get mesmerized by anodized chunks of billet aluminium, but found I needed to throw my weigh off of it to release slack, found that annoying. I do see a post here on the Buzz about grabs that release more easily, want to try them.
Same with alloy snaps on my rope lanyard, look great (so bright and shiney!) but for what a lanyard has to do: get tossed up over that, and come back down, the grams saved work against the function. At least for me.
Northwind