It feels weird indeed, but it's well usable and the results are a BIG advantage seen sharpness and contrast.
I managed to get my hands on both glass lenses. I re-sold the 114mm, no special interest for me, but I kept the 90mm. If you can live with the shutter speeds and only 2 apertures, it's a small and still lightweight 6x12 system, automatic exposure is reliable and keeps it simple and fast. A small tripod is sufficient. A description of the whole system is here
https://www.plastikcam.com/lomo_belair.htm Keep the camera resting on its back during transport, not stressing the locking system. Even hand held photos are well possible. The results are fine.
If you want a wider angle and a system that feels ridgid, I would recommend a Cambo and a 6x12 back. But that's much more expensive
https://www.oddcameras.com/cambo_wide_470.htm ....