Built my toolbox in January. I got it on sale at HD for about $15. I liked the overall size and that it could hold all the stuff that I bring to a brew day. Plus, it has removable trays the lid to hold all my extra fittings.
I put a rocker switch on it (was worried that I might accidentally "bump" it and turn on the pump, which hasn't happened yet) I considered wiring an outlet on it too, someone on HBT had one, but I didn't feel the need for it.
I like the portability and the fact that I have a place for all my bits and pieces. I have a stand for my MLT that the toolbox sits on when I brew. The pic included has the stand sideways from what I normally use.
My complaint so far is that it is heavy. With all the stuff in the toolbox and the weight of the pump and fittings I worry about the latches holding. The included pics show the toolbox in it's "empty" state. I just brewed on Saturday and haven't put everything back in yet.
Also, I worry about the heat generated by the pump. In February (think Chicago weather folks) I didn't notice too much heat with the box closed. I brewed this weekend (65 degree day) and had the lid opened. I am considering adding a vent on the side (as well as a partition in the bottom for more storage. But again, how does that affect the heat?)
Hope this helps. I love using a pump to brew with. Prior to using it, I had an fairly substantial 3-tier stand and the use of the pump greatly reduces my brewing footprint. Additionally, i am much more portable now and have greater flexibility by having the pump in the toolbox.
Hope this helps.