Well, the gloves kind of make it difficult to get a good tight grip right behind the head because the kevlar is kind of thick, but if you get some practice in with non-venomous snakes (for safety) you should be able to use them well enough. They have been bite tested and they definitely work, so they're a great tool to have (if a bit pricey) if you're working a lot with venomous snakes. It allows for better control than using snake tongs, but they only cover up to the elbows while tongs give you a safer distance to hold the snakes at. Lose control of a snake when its in tongs and you're still a safe distance from the animal, but lose control while holding one in the gloves and you're in strike range. Its vital that you get practice in and get used to the thickness of the fabric before handling dangerous snakes.
We were using the gloves to hold the snakes out to take measurements of body length and tail length, its much easier doing it that way than trying to use the snake tongs.