I switched to Colemak about 3 years ago and I'm a very heavy vim user (basically all I use at work). I remapped the navigation keys to úéñí (for up, down, left, right). So AltGr+ueni, which on qwerty would be AltGr+ikjl and this makes for very comfortable one-handed navigation. As a bonus, I mapped ÚÉÑÍ to 10ú 10é 10ñ 10í.
Other than that, I did not configure any other vim keys.
Overall, I love colemak and couldn't imagine going back to qwerty. I've internalised it and find it natural to type with and I'm still often amazed at how much I can type with the home row and I love how common key combos just roll off the fingers (ie they use keys that are right next to each other or otherwise really really easy to type in combination).
I dunno if I'm really much faster. Probably not, but my accuracy has improved and I find it much more comfortable for long periods of typing.
Other than that, I did not configure any other vim keys.
Overall, I love colemak and couldn't imagine going back to qwerty. I've internalised it and find it natural to type with and I'm still often amazed at how much I can type with the home row and I love how common key combos just roll off the fingers (ie they use keys that are right next to each other or otherwise really really easy to type in combination).
I dunno if I'm really much faster. Probably not, but my accuracy has improved and I find it much more comfortable for long periods of typing.