>>2066654OP, my girl and I have two of these that we used until we bought real kayaks. They are sturdy enough for rivers, lakes and minimal wave action (we did Dunedin to Caladesi Island numerous times).
They're fine for occasional-use casual yakking. They aren't good for fishing, rapids, or large waves. And I would absolutely not take it further than 1,000 ft from a shoreline.
The real downsides are these: They're slow because of the shape and weight-dispersion on the water. It gets worse the heavier you and your gear are. I only weigh 165 with basically no gear and it was noticeable. The paddle that comes with it SUCKS because it flexes quite a lot. Replace immediately since you'll need a good paddle for your "real" kayak anyhow. The pump works okay but is cheap and breaks easily. Recommend a bike pump with adapter desu, or an electric car pump. They are cool backups for friends who don't own a kayak and who only occasionally show up, though.