There a re defintiely a few more potential failure points if you choose to order. online. First, ordering online will require that *you* provide accurate measurements. I ordered a main online year and did a full set of measurements on about 3 different occasions to make certain I had accurate numbers (my own type-A/OCD). Having a local loft takes some of the mystery/responsibility out of that equation since they will come to your boat and take the measurements they need. The next factor to consider is who is actually making the sail -- your local loft may still have your sail made offshore, potentially saving both of you some expense of having them made locally. Not all offshore lofts are created equal. Some are experts at their craft and others are not. Whoever you use, local or not, , ask lots of questions -- make sure the sailmaker knows your expectations, ask about materials, construction, batten configurations, reefpoints, cunningham cringles, roach, loose foot vs shelf foot etc... I ordered a main online last year from National Sail Supply (Rolly Tasker -- made in Phuket). The sail is great -- Dirk at National Sail answered all my questions and absolutely nailed it. I did my research, obsessed with measurements and was thrilled with the result. I'm not convinced I would have had the same result with option #2 or 3. My local Doyle loft is awesome and they are all rockstars. They've built sails for me as well -- when they needed tweeking, the owner of the loft would come out for a sail so he could observe what I was reporting before anyone even touches the sail. You won't get that level of service out of anyone online.