Don't know yet, just bought mine during the Cyberweek sale at my local Cabela's.
I looked at some reviews, and the most often complained about thing was the weak processor ... or what they perceived as "weak" because it wouldn't update the map (boat position/direction) very fast. I'm replacing a Elite 5DSI with this Hook 7 ... so I'm already familiar with the slow motion update, and it's not that big a factor to me since I don't use the mapping system all that much (yet).
For what I paid for it ($300 otd) it will be fine as a replacement for the E5DSI unit .... since it IS basically a 7" screen model of the E5DSI unit, with the 2d broadband sonar added back in. I'm not real happy about the huge transducer, compared to the "fountain pen" sized transducer for the DSI unit ... since it's going on the trolling motor ... but, another quick trip to Cabela's and pick up the $20 plastic cup mounting bracket, and I'll deal with it.