What is the most important benefit on azelastine for anti-allergic treatment?

Please vote from 1 to 10 (1 not important to 10 important)

	1	2	3	4	5	6	7	8	9	10
a) fast relief of all symptoms (*)
b) easy to use, just when needed
c) increases quality of life
d) steroid-free, but equal efficacy
e) alternative for not responding to oral AH

(*): 15 minutes for nasal spray, 3 minutes for eye drops