I did a search and not much came up. Anyone have any experience with these personally? I know 1 member posted a while back. It’s in my price range so I was wondering if anyone had any reveiws. Thanks.
No, you’re right Plowboy, not much out there about them at all. Funny, they don’t even list Chiff and Fipple on their links page, so it makes one wonder. Not much on their website but repeats of what they said before, just in different headings. Their website is copyrighted 2010.
Here’s the link: http://celticwhistles.com/ in case anyone is interested in taking a look. I wouldn’t spend my money there personally-if they’ve been around since 2010, and no one here knows about them, then I’d go for something more proven in a Low D.
Read the posts on Chiff about Low D’s-there are many, and if you can’t afford new, post a WTB (want to buy) in the whistle and used instrument forums, for offers within your price range. Then read the reviews on what may be offered to you, and pick one that appeals to you.
But the only way to know in the end is how it works for you (breath requirements, finger stretch, tuning and tone). And allow enough time with a whistle to get to know how to play it as best you can before making a rash judgement about it, especailly if you are new to the low whistle and piper’s grip, etc.
Susato, Dixon, Guido Gonzato, Domnahl Na Gruen, Jubilee, Shaw, Howard, etc., all make decent, less expensive lines, and are often available used as well.
So good luck finding one in your price range that you like-and one that plays well for you. And welcome to Chiff and Fipple! Enjoy the journey. 
A recent discussion of budget Low D’s:
Thank you.
I may have to go ahead and get one… I’m like a cat when it comes to curiosity. Some things I just have to know and/or experience…
I’ll have some recorders going up on e-bay before too long probably.
I ordered a high C “Maith” whistle from this maker a few years ago, and it was no good. Made in the Guido Gonzato style from painted 1/2" cpvc, oak plug, and copper outer mouthpiece. Super quiet and required extra fine breath control to keep from squeaking into the next octave. The R1 hole was placed too high making the G painfully sharp, and several of the holes were misaligned. It was only something like $7 with the shipping so I didn’t bother returning it. At some point I’ll try cutting off a bit of the bell end, enlarging the holes in the necessary directions, and futzing with the fipple to see if I can get a serviceable C# whistle out of it.
Of course I may have gotten a dud, and/or the maker may have improved since then, so I make no claims about the low D being produced now. Maith means “good” and Fearr means “better”; amhrasach means “skeptical”.
Well then, I am very happy I could be of some help to you, and it took almost no time and thought to reply your question!