You should feel comfortable with either choice. A factory finished floors offers many advantages as it usually installs more quickly with little or no down time. It can be more convenient as the floor is ready to be lived on as quickly as it is installed. No odor or dust and less skill needed to install. Easier for existing house room renovation if you need to remain in the home while the work is being completed. Options are limited on choices, but you can view them all at once to make a decision to know what you are getting. Quality pre-finished floors are expensive so don’t be fooled by low entry level prices… you get what you pay for a far as the quality of the hardwood and milling along with the finishes that are applied at the factory. Custom designs are almost impossible with pre-finished floors so if you are considering borders, inlays and other layouts like herringbone, basket weaves, etc. this may not be the option for you.
Custom Sand & Finish On Site floors offer endless options and a true custom floor for your home. Many more options are available in wood floor species and grading of the floor. You typically have fewer problems over the life of the floor as each board is hand selected during installation then sanded, stained and finished by a craftsman. You can customize the color to your home you also have many more options on the finish with everything from a extra matte to a gloss and even zero VOC penetrating oils to customize the finished look of your floor. With the sanding process many companies offer dust containment to have little to no dust as the work is being completed so you can feel confident in your home remaining clean and dust free during the entire process. Site finished floor also have a better finished appearance as they are flat with no beveled edges and look better as you look across the floor with a much better flow. Not to include wear with the floor being flat your pets nails have no beveled edge to catch on, liquid and dirt will remain on the surface better and not fall into the beveled joints. More skills are required to complete a site finished floor and you want to make sure you are hiring the right craftsman. Check for proper training and memberships with organizations as the NWFA, Bona Certified Craftsman and online reviews.