I had two pairs. They are true to size as far as width, can be a little large lengthwise. I wore 1 tts 1 half size down, I'll buy tts when I find them again. No room for aftermarket insoles, they would make your heel sit too high and slip. But there's no need for them anyway, the midsole has a nice arch an the boost is very noticeable, I would land hard on my heels and feel nothing. They have a drop on the toes but not as drastically as other adidas, good board feel. The upper gets kinda floppy. Very good flick. My two pairs wore down on the sole first, they have the 3mc sole which I don't love but apart of that they have good materials, esp the rubber on the toeside.
Sorry if that was too long but I think they are one of the best shoes out there, give them a try.