I have owned my board for 4 years. I got on it once back when I bought it and aggravated a preexisting, nagging shoulder problem (multiple subluxations) by falling on my outstretched arm. For various reasons, I didn't board again until this winter. My first day on it, I was at the point of shakily linking turns, but kept catching my heel edge. One such time I whacked my head on snow nice and hard, mildly concussing myself.
Pretty rough start for me, but my second time out this year I took a lesson and it helped a ton! After 4 days this season, I'm now breezing down the greens and haven't caught my edge since. On to the blues next time I'm out, I think.