The Lexicon 80 is Olivetti´s best seller in Spain ever. The venerable Hispano Olivetti Lexicon 80 (not Lexikon) was everywhere, and it stuck. It´s tough but yeah, Uwe is right to a certain point.
It has nothing to do against a SG1, but c´mon, it´s not that bad! There´s a certain run on early Lexicons which have really annoying keytops because they look nice but are too small and you can easily stick your finger between keys. In fact, there´s as much empty space as keytops, turning the keyboard into a trap fro fingers. And it has an unique feature: that weird recoil which makes typing feel like jumping on a trampoline. You press a key and the machine "lifts" it back, your finger included.
All in all, it´s extremely easy to find here in Spain and competent enough, but it´s no SG1, true. But I wouldn´t say it´s bad, either.
And nope, no paper injector. Never seen one with it, at least, and I´ve seen quite a few because as I said they´re everywhere and if you´re not careful you can trip on one, fall off and lose a couple of teeth.
Sorry, I think I´ve deviated a lot from the OP!