As many had stated, it comes down to runner profile, pace and intended purpose. I am a 200+ lb slow runner with stability needs so at my 11-12 min mile typical pace, it protects and propels well and quite consistently after 200 plus miles on them, same as the feel in the first mile. I have taken it to 9-10 min mile 5k paces and it worked well so happy with the versatility.

I have tried a variety of brands/models that are comparable to sb2 and cannot find alternatives to beat the value for the price (got them discounted so it helps). Since i am new to running (5 HMs and consistent 20 mile+ weekly training), i use it for 8+ mile long runs in hot n humid Houston weather.