Personally wouldn't use mobile fitters, where is the 'clean room'? Both my cars have been done indoors!
Had the forester done by twilight tints in Chichester, not one noticeable defect, however the front passenger window film caught the door rubber and pulled up a little (can't be seen from outside) and he's replacing the whole window film for me without question.
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2005 Spec B 6MT - KiDO tuned (~270Bhp)
Custom exhaust - Cosworth filter - Samco Intake - Tints - Bilstein B8/B6 & STI springs - SuperPro ALK - Whiteline positive shift kit, rack mounts, rear adjustable camber bushes, front ARB mounts & strut brace, 20mm rear ARB with AVO mounts, - Hardrace Gearbox and pitch mounts - Prodrive PFF7's - Front Brembos - Kenwood CarPlay - 1/2 carbon grille - STI front splitter