dgs,
Welcome to the forum.
I don't have one but have seen debate, on here, of their usefulness. I guess they're not a bad idea to give you an idea if you're getting too steep. I just wouldn't get too enamored with counting on the meter to warn you. You could be on a less than critical slope and drop a downhill tire in a depression and You'd Be depressed in a hurry. Just remember (you may well know this) keep it low and slow and mind on the job at all times.
Good luck, be safe.
Tom