I actually disagree GeeTee,
I have the same compressor, I have mounted mine under the seat in my GU and never felt it has decreased usability. I will say that having 2 hoses means that I dont have to be super close to what ever it is I need to use the compressor on (the second hose is not expensive)
I have used mine on the boat trailer, camper, other peoples cars (people at work think its kinda strange that I have a compressor in my car all the time)
The other advantage I find in having it permanently mounted, is that all I have to do is grab the hose, plug it in and flick a switch. I dont have to pop the bonnet, clip aligator clips on etc etc.
JMO but personally I prefer to have it mounted.
B