Having two control keys is really useful because then you can alternate hands. My layout looks like this: [super] - [left meta] - [left control] - [space] - [r

Having two control keys is really useful because then you can alternate hands. My layout looks like this: [super] - [left meta] - [left control] - [space] - [right control] - [right meta] Having control and meta right next to each other also makes C-M-* combinations easier to reach.