I was reluctant to try Ignite because of all the negative posts I've seen on the forums. I gave in and downloaded it when the free loot box went Ignite exclusive. I have to say, it's no where near as bad as I've heard. I open Ignite, log in, hit the lootbox, then log out and close Ignite. It slows your computer down when you let it run in the background all the time.
That being said, the free loot box is the only advantage I've seen to having Ignite. I am curious as to what it's greater purpose is supposed to be beyond downloading the game clients. Updates and news are already displayed on the individual games' updaters.