I've had the impossible burger on multiple occasions. Every time I've had it, it felt like whoever cooked it either didn't care or was trying to present the burger as basically as possible to try to demo it as a discrete product. The trouble is, that's not how anyone over the age of 10 actually eats any kind of burger, so it's not really a fair presentation. If you actually season it (it absolutely needs salt and pepper) and put on equivalent toppings and condiments, it's really not bad at all in my opinion. I tend to view it like soylent. It's definitely not as good as a good beef burger, but it's good enough to consider eating regularly for convenience and health reasons.