I’m planning to get a low G whistle. One criteria is that it not be too temperature sensitive. Any opinions/impressions on a Burke composite low G? Others? Thanks.
O’Riordan (unavailable) and Copeland are by far the best Low G whistles I’ve ever heard or played. The Overton is very good. Haven’t played a Burke G. Susato isn’t bad. Haven’t played a Water Weasel, but if anything like the Bflat and A, you should see if you can pick one up somewhere.
Haven’t played a Hoover G, but I’ll bet some will chime in that Mack can make a good one for you.
Philo
I have a Water Weasle and absolutely love it. Glenn was a wizard-- he really knew how to make a humble piece of plumbing sing!
I have three Low G’s. A Copeland , an Overton , and a Humphrey. As Phil said , the Copeland is a wonderful whistle with a haunting sound. The Overton has the classic “cosmic drainpipe” sound and is the easiest to play. The Humphrey has a bit brighter tone , but still full and rich. IMO
They are all quality whistles and different enough that I play them all , in rotation , and I probably won’t be letting any of them get away !! 
Have a Great Day and Fun Whistling !!
I’ve had a Burke composite, Water Weasel, and Copeland Low G. In my opinion, the Copeland is a far, far superior instrument. The Burke Low G was disappointing to me. Sort of thin and reedy sounding. The Water Weasel was good, but not as good as C, D, or Eb Weasels.
Best, John
Phil is right about a Hoover. I have a Hoover black tipped aluminum low G that plays well, on tune, and sounds great!
tom
i got the hoover pvc low g for my first low whistle and am really impressed not only with how good it sounds but how good it looks too and for the price its unbeatable
Copeland
I have a Copeland, Burke, Reyburn, Humphrey and O’Riordan. I use the Burke the most–it’s very sweet and has a great tone, perfect intonation. The O’Riordan is the best for certain tunes, and not gutsy enough for others. The same is true for the Copeland, but in the opposite way: it’s so very gutsy, and sometimes it’s just too much, but sometimes it’s glorious. The Humphrey is a very good all around instrument, and I ended up selling the Reyburn because of the wooden head. I know this doesn’t help much, they are all so different. But you’ll find it difficult or impossible to get an O’Riodan and very expensive to get a Copeland. If I could only own one, it would the Burke.
The G’s are nice whistles, but not much like the fantastic Bb and A Water Weasels. Very different sound and feel.
It’s been a long time now, but I remember the low G Thin Weasel being very nice.
I have a Hoover CPVC low G, and it’s one of my favorites. It has a sort of complex resonance, but clean, with no raspiness or breathy hiss.
JP: Please check your PM.
Best.
Byll