Only 1300 PIC hours in 604/5 and 13000 total, so still learning.... But I love our 604. Reasonable range, a "lucky" one, with very few issues that have grounded us. Only once in two years... Climbs better than people say up to 33000, then suddenly fizzles out. But it is correct, climb at a lower rate and faster speed and it gets there!
I like the 605 screens better, but swapping between them and having iPads makes the 604 fine. In a way, the information is a little less cluttered on the smaller screens.
The wing is close to the ground, so no low wing cross wind landings.....but really, short runway and crosswinds in Iceland, turbulence and short runways in Italy, winter in Russia......make certain the wing is clean for take-off, but once airborne, seems to handle loads of ice without problem......and she handles everything, while giving the passengers a good ride and the FA a reasonable work space. Far better than Embraer or a Falcon 900, the girls say. We take it from Japan to South Africa to South America and far northern Canada, so all conditions.
Good luck!