Peter -
I looked into it at one point but if I recall the dimensions didn't seem to work for the bilge layout in our boat (because of the keel bolts).

There are some arguments against check valves (prone to clogging), which you can find in prior threads on the bilge pump issue.

One other caution -- while on the general subject -- is that if your autopilot compass is located in the area be mindful of potential interference.  I moved one of our two bilge pumps a few years ago into the middle of the three bilge chambers and then started having autopilot issues, turned out the pump was affecting it so I had to relocate back to the after chamber. 

If you do install this pump, let us know how it works out.  It does look like it has some nice design features (tbe centrifical pumps leave a lot of water....)
 

I was thinking about installing a small diaphragm pump as a first-use nuisance water pump myself. I was going to use the Floject Quad II sold for under $150 as it was relatively low volume.  I've got a dripless stuffing box, so have very little water, but I like to keep it as dry as possible.

I'm surprised you're thinking about installing it in the bilge at all. The nice thing about diaphragm pumps is that they can draw a suction so you can mount it above the bilge.  You could mount this is the rear lazarette, and just run the intake hose to your bilge area, similar to how your manual bilge pump is run. 

Peter;
I see by reading the spec's on this pump, that it uses 'electronic water sensing technology'  We had a 'Whale' pump in the bilge with the same 'technology' and replaced it with a more traditional model. The problem was that the' water sensing device' requires that the pump turn-on once every one minute period.
 The pump starts to run, then when the pump sees no water (or current being drawn) - turns itself off. This cycling was a real bother when trying to sleep in the salon. The clicking on and off all night was enough to kill a good nights sleep in a quiet cove........