My interest in minimalist shoes recently reached a tipping point, so I invested in a pair. Vibram is the most popular brand. They look like actual feet - a little too creepy for my taste. After some research I decided to go with TadeEvo. It's a company in Poland, and they make only one shoe. Now THAT'S focus! I liked their shoe because of the hyper-flexibility that mimics being barefoot.
If you recall, when Vibram first came out about seven years ago all these runners hopped on the bandwagon and promptly came down with foot injuries. So I took it slow - only wearing them on walks for the first couple of weeks. Gradually I started using them during weight training workouts. After about a month I gave them a whirl in high intensity workouts.
I like the shoes a lot. One thing I've noticed is that my knees feel a lot better. The theory is that going barefoot strengthens the kinetic feedback loop which brings about a more natural gait. These shoes have taught me that we are not meant to run on concrete. I can really feel the pounding that my feet take running on hard surfaces, so I do my sprint workouts on a grass field, and it's a lot of fun. Running on grass in these shoes makes me feel like a kid again.