I’ve had the Wahl seniors for probably 15 years now. But a friend has had their Andis masters since the late 90s. We used them in high school. I don’t think you could go wrong with either, or even the Oster fast feed. The Oster classics I’ve heard are basically indestructible as well. I’ve seen some people mention if you take care of just about any clippers they should last. I clean and oil mine after I use them, and have since I bought them.