I am using these as feet on a problem set with the medium dripstone slopey edges on my 35 degree wall. I had been using the slopiest of the slopey edges as feet, but I found there just wasn't enough there to toe into. In come the font steep wall feet to save the day. They still have some rounded slopeyness, but there's also something there to dig into with the toe. I like the varied shapes, as you can rotate them to change the difficulty. Paired with the slopey edges for hands, I still have a nice V5/6 problem, which is what I was aiming for. Assuming I get stronger, I may swap the slopey edges back in for feet and use these font feet on another problem, maybe even for hands...