I too have had to cut my 'Apple Blossom' right down to provide it with a stronger arch to grow over. It came back really strongly and currently(early April) is stunning.I can smell the blossom over 5m away.
It is a very strong grower and needs space to grow into - with a strong support to cling onto as the weight gets heavier with each year.
I love it, beautiful flowers and perfume in spring, bronze new foliage, evergreen and mine usually provides me with a second flush of flowers in late summer. A plant I would not be without.