Super smooth opening and closing. The wave feature is great, opens while removing ti from your pocket (and only if you pull it back behind you while removing it). The ergonomics are perfect, sooo comfortable to hold. Weighs 5 oz, but seems much lighter. The unique blade shape is much more than just a cool look. 2 distinct sections of fully functional cutting area. The blade is also completely hidden inside the handle when closed. The liner lock is very secure and engages with a satisfying (loud) click. Since the lock sits below the surface of the handle, no chance of accidentally releasing the lock while open. I like this better than my Manix 2 XL, Sage 1, Flashbang, Rake,Blur... Absolutely my favorite knife.