Cazishmwrote a review of Five Ten Siren Lace-Up Climbing Shoe - Women's - 2012 on August 24, 2010
Got these and as many other reviewers have stated, they are comfy out of the box and yes they do stretch. The speed laces are useless too (pretty flimsy and did not do up tight enough). I was actually very hesitant in purchasing these shoes as my feet are very difficult to size. I have very small (UK3) wide feet, so I was quite nervous when I got them out of the box and saw how narrow they were. The heel was looked too narrow for wide feet. However, because they do stretch, after about 3 weeks, they were actually a comfortable fit. I use them trad climbing and although they have stretched a bit, I find using the regular laces, I can get them tight enough for good feel on the rock. They are grippy enough to smear with (doing some sandstone rock at the moment) and precise enough on and around the toe for edges and very tiny lips. The rubber did soften up a lot quicker than I expected. With these shoes, even when my feet are swollen and sweaty, they don't blister/slide/make noises (had a velcro pair which scared the crap out of me whenever I positioned my feet in an awkward position). Overall, a good starter climbing shoe.