I just looked it up and it seems like a nice waterer but it seems a bit expensive. You could get a floating stock tank heater or a bird bath deicer, a 5 gallon bucket, and a pack of poultry watering nipples, and make one yourself pretty quickly and easily and it would work the same, possibly better, for way cheaper.
They have vertical nipples or horizontal ones. I personally like the horizontal ones. They also have poultry watering cups and a few other designs. Just depends what you’re looking for. The cups may be more likely to freeze because I think they hold some water in them but I’ve never used them so idk. They sell packs of them on Amazon and eBay. You can get quite a lot for cheap or they have smaller packs, depends how many you need. Typically one nipple is enough for about 5 birds but on my bucket I have about 4 or 5 at varying heights and opposite sides of the bucket just so multiple birds can all drink together if they want to without fighting. But fewer would probably be fine. They don’t seem to use all of them anyway but do definitely have their height preference. I have 11 birds right now.
I also have this heated dog bowl that I’ve used the last couple years in winter cause at one point my waterer broke so I got this and it works great. They also have smaller sizes for cheaper too but for some reason list them all separately.
https://www.chewy.com/kh-pet-products-thermal-bowl-pet-bowl/dp/54452
The bowl works great but this year I think I am going to try adding the heater to my bucket because they do get the water dirty pretty fast with an open waterer. But I am in Massachusetts and it kept the water unfrozen all winter.
So I think either of those options (heater in bucket or heated bowl) would be great but of course if you do not want to make your own then I think the Premier one would probably work fine as well.
Good luck!