Hey, so I bought the Aqualock 5MM a month or so ago. I love the suit, the size charts on the website is perfect and fit me just right!
I bought my set from scuba.com, however; when the set came (boots, hood, suit, gloves) the boots zipper broke in my hands as I was zipping it up. I don't know that was so, the next day I sent it back to scuba.com and literally waited like almost 3 weeks to get my booties back.
With that said, I've used the suit in diving down here in Florida, if you're diving warm waters I recommend you get the 3MM the 5MM keeps you warm and nice, my second dive with the suit (without the booties) I dove in waters that was cold (72 degrees) and the gloves came in handy, I haven't used the hoodie yet, and I don't even know if I will but winter is coming so we'll see.
If I could do something about changing, I'd buy the booties and suit alone. Instead of the whole set, but it's also good to have the set on hand so up to you.
hope that helps!
p.s. I noticed your from Canada, so 5mm might be best with the temperatures up there.