Deference should be given to a trial judge's Charter analysis:

R. v. Campbell, 2012 ONCA 394 is a good source for the principle that deference should be given to a trial judge's Charter analysis:

[16]       Deference is owed to a trial judge's s. 24(2) analysis.  Where the trial judge has considered the proper factors, appellate courts should accord considerable deference to his or her ultimate determination: see Grant, at para. 86.