I'd be hard pressed to find a more Swedish scene than the opening robbery of IKEA, except that it's not depressing enough maybe. Other than that, the fourth movie about the Jönsson gang, and apparently the first not to be based on the similar Danish film series Olsen-banden, follows the previous films' formula and has very little new to offer; in fact, one might wonder why the gang keeps doing heists when they end up millionaires in every film.
If anything, Jönssonligan dyker upp igen seems more influenced by slapstick, which is unfortunate because there's something forced about a lot of the comedy in here. It does introduce Johannes Brost as the one-armed, steel toothed henchman, who is pretty fun as a blatant nod to the James Bond henchman Jaws.
Cool henchmen notwithstanding, this is probably one of the weakest entries in a series that was never all that strong, since both the comedy and the heist scenes are weaker than in previous films. Still, it is decently entertaining, and you're not much worse off watching this one than any of the others.