I watched Primeval. It's sort of goofy. Entertaining, but goofy at times. Like Gustov the killer croc saving the girl from getting raped.. that was goofy. The croc was a little unbelievable. But it was worth a watch, for sure. I have trouble believing much of that actually happened.. but perhaps I'll have to read a little bit about the real events..
I like the croc movies more than the shark themed ones simply because sharks tend to be more predictable. They appear, they attack.
Whereas crocs, in real life (& screen) are still a mystery to their behavioural habits. They can ignore you completely adding to the suspense or attack when least expected. Plus getting back on land doesn't guarantee your safety.