I had the front off the "new" Sporti 4 last night. The shutter was sticking - especially if you used the camera sideways. A quick squirt of WD40 seemed to do the job, but only the next test roll of 35mm will tell.
Everything was well overexposed, and was rescued in Photoshop. Still, I really like this one.
Hopefully the next one will be better, and will justify buying some Efke 127.