I bought two pumps because I was tired of lugging water by hand for 5-gallon batches and had no desire to do the same as I move to 10-gallon batches. These pumps are extremely quiet, easily move water and wort from vessel to vessel, and flow rates are never an issue (full disclosure: my system has no significant vertical displacement). I've been extremely happy with the pumps and would not hesitate to buy again.
I did look into other pumps prior to purchase and got these based on price, noise, and performance. I like how quiet they are, the IP44 rating (but do use GFCI), and SS heads being standard. Only wish is they had an in-line switch - but I can easily adjust for that.