I currently have a Bronnica SQ system and I've been very pleased with the quality of the gear. I've looked at the GS-1 out of curiosity and I've seen I could very nearly trade in my SQ system for a GS-1. I like the 6x6 negative, but I'd also like to try working with the 6x7. I do most of my work outdoors and without people, so the lack of compatibility with a flash system is alright by me. The GS-1 does have a 6x6 back, so I'm wondering if there is any reason not to trade in?