ive used its 12pin sidevu cousin the gt51 a lot.
its been one of the better all round transducers ive used and installed , hesitant at first with the lower KH high frequency. im still a bit ...hmm about it.. but it does give stupid range in side vu with 245-275. havnt been able to get deep enough yet to give its downvu a good punish.
im fishing in 20-60mt.