I've used the 188 on my boat for 4 years now. Overall, I'm very happy with it. The chartplotting is great. The fishfinder could be better, but that may be a matter of me not having the unit adjusted correctly.
I signed up to have e-mails sent to me when there are software updates available.
I'm considering moving to a color unit now that the prices have come down (I paid $900 for the b/w unit).
I'd rate it an 8 out of 10.
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