Hey BostonBound, You know me from the Marathon Training thread....I'm actually the OP here, changed my name for the thread.....
It's interesting that we both had the habit of training in Guides and racing in Tangents. I'm a person of habits, and so with the Tangents gone i am worried about messing things up.
I actually do own a pair of Fastwitches but i have not used them yet. They seem a bit too light for a marathon. I may use them for track workouts. I currently use Tangents for all track work, nothing ever lighter than them.
I've been with Saucony for 5 years and have not tried another brand. Why mess with a good thing? My concern is sizing. I buy everything online so i want to be sure saucony sizes are consistent with other brands (i know Nike is different).
Note that i also stick orthotics in my guides and tangents. I'm not sure if i even need to but ever since i cured my PF with orthotics, i wear them for all running even races. Why mess with something that works.