I have a Hawkeye and love it.  I usually get at least two weeks off of the four or five aaa batteries.....unless I leave the light on..duh!  I use the unit a lot during our trips.  I would say 30 hours of actual running time is about right.  I marks fish fairly well, but will show larger rocks as fish sometimes. 
Couldn't be happier with it.
Safe travels......Mike

Reading MP's informative post I remembered when a few of our QJ family said they have one of these.

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I have a Pirahna Max I set up with a battery box but
for my style of tripping at least, for now, I don't need or want to haul a fish finder and separate power supply.

I mostly troll while moving, maybe stop at a running water source and fish from shore in camp.

The only time I might use a fish finder is on camp days and even then it won't be for hours at a time.

What I want to know from the REAL TIME experiences of QJ members that have used these is the BATTERY LIFE claim.

I know it will vary some but they claim 30 hrs off 4 AAA batteries? Is that even close? If I could get 20 hrs and take 8 AAA batteries for MY kind of tripping all in one unit, I would be very happy with that.

Did anyone use one yet?