I have yet to see a Polymer $5 bill in my hands, but I do have to admit, the $10 bill is not bad, but not the best $10 bill ever existed in Canada (that title goes to the 1971 issue). But it is nice to see Sir John A. MacDonald's portrait facing to the left for a change (first time since the 1937 issue $100 bill, if I recall), plus MacDonald's hair appears to be a little shorter than in previous issues, and I do admit, the reason why the Polymer $10 bill is not overly the best denomination of all the Polymers issued, is because the shade of purple doesn't stand out as greatly anymore (if I am not mistaken, the background on the front is more of a lavender and not a purple). But in either event, it really was great to finally see a Polymer $10 bill in my hands, as that was something I was looking forward to for some time (after such a long dry spell for new prefixes).
If I am not mistaken, the Polymer $5 bill may mark the first time in the Bank of Canada's history that Sir Wilfrid Laurier's portrait faced to the left instead of to the right on any banknote that Laurier appeared on (the latter of which it has been since 1935, if I am not mistaken). I will supply feedback on the Polymer $5 bill when I get one in my hands (I'd say I will likely see at least one in my change before Christmas).