While choosing law firms for VS's or TC's, an important factor I consider is their M&A practice as I have done a few internships in this area. However, 70 to 80% of law firms are experts in this field, with the only difference being how significant deals they are involved in. For someone interested in practising specifically M&A, what are the other criteria's that makes law firms stand out when many firms are experts in the same field? Is it only the deals they are involved in?