TYW Rules?

[Atheling]

I have a feeling that this question might well have popped up before!

With the release of the 1898's Miniatures Spanish lovely TYW range I find myself inexorably drawn to the 'period'.

So, my questions would be (For 28mm):

1/ What rules are you using?

2/ Why? What advantages do they have over other rule sets?

Please, fire away!