I have the bobbin winder that came with my Babylock Tiara (which is made by Handi Quilter, btw). It’s easily one of the more expensive winders on the market, and it’s not one I’d recommend as it gives me fits.
I purchased a Gammill three days ago, but while researching Longarms extensively, also researched bobbin winders and ordered the Innova bobbin winder online. It’s half the price of the HQ winder and from everything I can tell, is several times better.