This is a best selling and favourite heated bird bath. (And my favourite! ;) )
1. Yes, it does not hold as much water as some other heated bird baths. It will require filling more often. So you will want to consider where you place it if you are trudging through snow to fill it up.
But the flip side to this is, filling it more often means fresher and cleaner water for the wild birds. Our bath gets lots of use all day, making it necessary for it to be dumped and refilled with fresh water daily.
Also as I mentioned earlier, small birds would rather not have to deal with a lot of deep water in a bird bath.
2. The cord is very short. You will need a three pronged extension cord suitable for outside. (Note: If the company made the cord longer then the price would be considerably more for everyone, whether you needed the longer cord or not.)
See other good heated bird baths.
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