My last few pairs of cross trainers have been Rykas, but I recently decided to try something different, and a friend recommended these.  They are probably the most comfortable athletic shoes I have ever owned -- and yet also the most expensive!  The extra cost, in my opinion, is definitely worth it.

The gel cushioning makes these so comfortable, especially if you do any sort of workout that involves plyometrics or jumping.  I have a tendency towards tendonitis in my right knee, and jumping in these shoes makes such a difference on my knee!  They have fantastic arch support and great cushioning throughout the footbed.  (The gel in the footbed is what makes these so comfortable.)

I've used them for plyo workouts, weight training, kickboxing, and step, and they work well for all of these workouts.

As for fit, I noticed on the Asics website that they said to go up a half-size in these shoes, and that's exactly what I did with these.  I usually wear a 7.5 in "street" shoes and an 8 in athletic shoes, and the 8's in these were perfect; while a 7.5 probably would have fit, the 8 gave me good toe room, but didn't make my feet wiggle or move.

I'm a new convert to Asics shoes, and will definitely be replacing these with another pair when these wear out!