Our yard is a potpourri of Alternative, Canadian Tire, Green Spot and Patmore (RIP).
Hard to beat Green Spot for selection + knowledge of local growing zone but still usually find myself looking at other options first because of the 50% warranty (on trees at least which is what I mostly work with). Got some great quality stuff from Canadian Tire around this time last year that came via Bylands of Kelowna.
You sometimes have to do your homework with the big boxes, have caught more than one of them in the past selling trees that simply arent intended to survive long-term in our zone. I guess if there's a 1 year guarantee you just swap it for something different after it doesnt make winter but there are some trees that just shouldn't be sold in this market.
Interested to see what Alternative's doing with the second location. FWIW I was told that Peavey Mart has plans for some kind of garden centre type of setup.