The ETRS is a great camera. Mine has followed me around for several years, from Eritrea to the arctic circle, including stopovers like the inside of the Cheops pyramid...
Bronicas have no problem with outdoors - at least not more than other non-underwater cameras.
The lenses are very sharp, a comparison shot with a 35mm back, same film, same exposure, with a friends Nikon showed the Zenzanon 75mm to be significantly sharper than his top-$ Nikkor lens (can't remember which one, as I've never felt the need for one!). I also have a 150mm and a 40mm, both truly exellent.
I'll advise you to get a 120 back, 220 film availability is limited and seems to be getting even worse.