As always, I like to use a product and give it a fair shake before I review it. I bought this pump in late July 2017. My initial impression was favorable. I have a fairly large fountain (100ish gallons). I purchased this pump rather than a higher volume pump because I enjoy a more tranquil sound. It had plenty of lift and handled the small debris that occasionally got in the fountain. I run my fountain on a timer, so it operates about 10 hours per day. The pump lasted 6 months then suddenly lost its volume and lift. I tried cleaning it but had no success reviving it. I've used a variety of brands and generally get at least one to two years before I have to replace them. My last one, a Beckett pump, lasted over 3 years. This pump was good while it lasted, but didn't hold up very long.

am sure a pump in good working order would be great, but the one I got, even though it said INSPECTED by #XYZ, I plugged it in and it sounded like the shaft was broken, bad brushes, NOT sure but Amazon authorized a return for free and I had a credit in days. I'm trying another one. Let's hope this one REALLY WAS inspected by someone other than #XYZ and they choose to do their damn job instead of being busy possibly sexting. You could tell the other had been opened and taped up, no doubt returned by someone else, NOT COOL. I needed that pump last week. Someone cutting corners and really not doing their job cost me time and inconvenience, as well as whoever it was selling this item to have to pay for it's return.

This pump is unreliable. It did not start when we plugged it in. It started only after it was moved. Sometimes it stops and starts again if we move it. We got a defect. The sellers return policy did not support shipping us a replacement and then return bad pump. We were stuck with it as we had to have a pump in pond.

I am very pleased with this pump, using in conjunction with TetraPond SF1 Submersible Flat Box Filter, and a bamboo spitter fountain on my 75 gallon re-purposed stock tank. The Tetra combo is doing a great job of keep my fish pond (re-purposed stock tank) crystal clear.

This pump is working quite well for me. I used it to replace a 900 gph (give or take 50 gph) pump that I was using to power a small waterfall in my pond. This pump fit the bill quite well.
The intake screen comes off and reveals a female threaded intake nozzle. I was able to attach a 1" threaded x 1" insert PVC connector to connect my 1" intake line (coming from a skimmer with a large particle filter) to the intake of the pump. I used the same type of connector to go from the outlet end to my existing 1" flexible pond tubing (also a Tetra Pond product) to the waterfall (again, Tetra Pond). The waterfall advises using a pump between 1000 and 2000 gph, and this pump does a nice job keeping a good flow of water running whereas the smaller, older pump just wasn't meeting my expectations.
As mentioned above, I plumbed into 1" tubing (inlet and outlet), and everything seems to be working just fine. If you choose to do this, keep in mind that you will experience a reduced flow rate because of the increased velocity and friction because of the smaller pipe. I was satisfied with the flow rate in my setup, but YMMV.
I have had this running nonstop for only a few weeks so everything is still working as expected. If this changes, I will return to update my review accordingly and describe my warranty experience.