According to your profile you have an ST1300. Honda went to the liner-less, coated cylinders when the 1300's engine was introduced, so you already own and have been using this technology for however many miles your ST has on it. I've never heard of any kind of block / cylinder problems with the ST. Honda are just now doing the same with the GL. This is a well proven design. They previously used iron liners for the ST1100. My ST1100 used about a quart of oil between 5000 mile changes but my ST1300 uses none at 150,000+ miles. Of course the manufacturer has to get the application process correct and I suspect with Jaguar, they muffed that up as opposed to the concept being a bad idea. After all Jaguar had their own unique experiences with electrics, yet they are conventional. The word Nikasil is a bit like the word "Kleenex" it's become generic when referring to aluminum cylinder coatings. I think there are a number of different ones out there with superior wear and adhesion properties over the original Nikasil coating.
The one disadvantage I can think of is that the cylinder cannot be re-bored if damaged. With street bikes there's hardly a need anymore, these coatings are harder than steel so wear life is really long and so long as you don't go blasting through the desert dust with no air filter you should be good until you're bored of the bike.
