I would like to represent both sides here (double hand & single handers). I love spey and find something totally accelerating of the casting & simplicity. I use this style in all applications, in fact I do more snake rolls & single speys with my single hander than I do overhead casting. But, (always a but) there are things that the longer rods(magic sticks) hinder IMO. They can dampen the fight of the fish, because of the length, lines are quite heavy for any given "rod weight" & the complete rig is heavy to just carry around (I'm a 3-5 weight single hand kinda guy).
+75' foot casts with ease, sure, it is totally effortless but you're throwing 450+ grains. What is that, 11 weight class? These aren't "magic" rods, pure physics.
I think on a forum both "pros" and "cons" need to be identified, especially for the newbies.
See you on the river!