I think the fact that MK's music is covered at all, even badly, is a compliment to him and better than being ignored completely!
Meant to be sung by the angels, though!
I find that the whole appeal for me regarding MK's music is the contrast between the beautiful guitar and Mark's rather less than perfect vocals. Nobody can do it like MK!
The Celtic Thunder version was sung very well, but was just too smooth and cheesy and lacked soul!
Regarding the Sultans, Finnish style. They seemed a good band, but it was not Sultans they were playing! Sometimes I could hear Road to Hell in there plus other stuff as well!