We have the bigger striker for the boat and its great, this one you posted has quickdraw which would be lekker to have..Should be perfect for kayak, you want a little fish finder (dont really find fish with it haha) that takes little space and does not chow your battery. Looks right, with bonus features and color screen. My skipper has caught more big fish off a kayak with no finder just knowing the marks and his stuff, than I have caught on land, boat and kayak added together times ten..so it is relative..sure it will do.
On a sidenote, we had the first striker sold in SA I think, were waiting for it for ages and was just luck as we were waiting for new finder to replace an old one that bombed out like day before warrenty ended, when they got released. We were given the striker to replace that one under guarantee after putting a little to cover the difference in price I think.. It bombed out soon after install (was the promo unit) and we were given a new one immediately with no questions which has lasted just fine since then for 2 seasons, thanks, Garmin and Commercial marine for good service. So ja even if your garmin bombs, they stand by their product. I have a handheld garmin that had bluecharts loaded on it, that has been to sea too many times for a few years and it like brand new.