What is the purpose of the purchase? As something new to add to the collection? As an EDC user? If the former, then the Buck 110 auto is a great choice. If the latter is the goal, there are better options IMO. I loved the release of the auto version and am happy to have it part of the collection. But it would not be my recommendation for someone just interested in a general purpose EDC automatic. It's pretty heavy. There is no safety and the button WILL fire on you eventually if you just put it in your pocket--ask me how I know. Sheath use is a must if you don't want to ruin your jeans, or worse. I polished the blade and bolsters to a mirror finish, polished, oiled, and waxed the handles, and added mine to my display collection. I pretty much got it for the collection, as I already own a 110 standard. Its a beautiful, classic piece. But its just not a good EDC choice IMO. Can it make an EDC? Sure. There are just better options IMO if thats the primary goal.
Protech makes very well designed and built autos. I have a few in my collection. Consider what you will use it for, however. Majority of their lineup are generally light-use knives with relatively thin blades and fragile tips, so if they will see extensive, daily use, stick to their 'tactical response' model that's more rugged..Microtech makes very rugged and durable autos and if you want a decent OTF, they are tops in that area IMO.