I replaced all the doors in my house upgrading from cheap builder grade hollow doors to modern profile solid core.   Door levers can run about 50-70% of the cost of the door (excluding installation), so when I saw these, I purchased these door levers for my entire reno (24 doors).  My installers said they were very easy to install.  The quality was comparable to those at 3 times the cost and they look & feel perfect. 

Pros: Good value, solid construction, easy to install
Cons: none