Nothing extra special but it is a good sturdy mouse. Performance It moves fast and is accurate. Sometimes it continuously drifts off in a random direction though. Durability This is a fairly durable mouse. It is fairly heavy and seems solid as opposed to some smaller mouses which seem hollow. Comfort It is not one of those funky looking ergonomic mouses (I think those are overrated for comfort anyway), but in my opinion very comfortable. I especially like the scroll ball located in the middle of the mouse. It is softer and and offers more grip than many mouses.