Product review (5 stars): I am very pleased with the product
I have installed the MagVent MV-180 without any installation problems.  The magnets line up well when the two parts come together.  Thus there will be no lent obstruction between the dryer and the wall.  I am very pleased with the product.  I can't really comment on the MV-90 and how it might work since it does have a 90 degree angle to be considered.