I prefer the low whistle sound and thought someday of possibly getting a Low C or even a Low A whistle. Has anyone ever played one of these? How is the fingering and the breath requirements and how long are these anyway?
I had an Alba low C here for two weeks on tour. It was not difficult to play at all. At least it was no more difficult than a low D. There were a number of people that thought the Alba low C was easier than most low Ds. It also had a a great sound.
Ron
I have an Alba Low D and it really does have a great Flute-like sound. It is also a beautifully made whistle. I also have a Kerry Low D and it is easier to play in the 2nd register. The Alba definately requires more force to play in the upper register. The Kerry seems to require more breath because it doesn’t have very much back pressure. It also sounds more like a recorder than a flute. However, if I had to pick one to play in session it would have to be the Kerry because it does play so easily.
I was on the Low C tour too. Here is a link to the portion of the thread where I posted pics of my Overton Low D and C compared to the Alba Low C.
http://www.gaeliccrossings.com/forums/viewtopic.php?t=934&postdays=0&postorder=asc&start=345
I’ve got the Alba Low C now 
and I can echo the comment that it takes a bit more to get into the upper half of the second octave. Especially compared to the Kerry Songbird Low D, which is really sweet!
I have an Alba tunable low C,with a supplementary low A body,which Stacey made for me after I had purchased the low C.
The low C is very playable-I don’t have very big hands,though I do have longish,skinny fingers,and I find the low C a pretty easy stretch,with easy to cover holes.
The low A is another matter.Due to the large stretch,and the pure size of the instrument,I’d say that it’s on the very edge of ‘do-able’ for me.
My hands soon get tired,and my fingering gets sloppy.
Consequently,I don’t play the low A very often.
Maybe a low Bb would suit me better.