Absolutely gorgeous. The takumi sen 2 is quite honestly the best racing shoe I have ever come across in my entire life. I'm on my fifth pair of Adios 2s, and I use them for all my steady runs and tempo workouts, but come race-day or a road session, the takumi is my go-to shoe. Imagine the fit and feel of the adios, but with loads of the weight just gone.
If I had more money to spend then I would run almost exclusively in them, they are that good. Raced in them over 5k, 5 miles and 10k, and I didn't feel remotely hindered in the shorter events nor did I feel any lack of support in the longer ones.
Best road flat ever made. For reference, I'm a 20yo student, around 5'9 and 132lbs, with a very efficient gait, with a forefoot strike.
Hope this helps!