GREAT LOOK!  When wrapping windows, I usually like to build out the trim either 3/4″ or 1 1/2″, depending on the depth of the existing siding.  This accomplishes two things.  One, the built-out trim will shed water better, rather than potentially allowing water to leak in behind the siding.  Two, it simply looks better to have the window trim protruding slightly beyond the siding.  Check the before/after pictures below.  I top off the wrap with a good, 100% silicone caulk seal (50 years).  I have a flat rate (per window) for these services, so call for details! 419-212-3200