During last few years I got one simple but very true thing - in photography result directly depends on photographer's skills, experience and creativity, and only a little bit on equipment used. Yes, Lubitel (mean "amateur" in russian) is simple and low quality camera. Of couse "better" TLRs are more easy to handle, have more features and better build quality etc. But if you know and understand what you are doing Lubitel may give you very good results.
Here are two links to galleries with pictures from 2 very first 120 rolls I did in my life - Gallery 1 - (click here) and Gallery 2 - (click here). I understand that they aren't that great from "artistic" point of view, but from "technique" side I do not see any issues there. They are good enough medium format pictures so the most people will never ever guess that pics were taken with Lubilel if they will not be told so.
Is Libitel my favorite TLR - no, not at all. But I will definitely spent another $30 to buy one more of those on *bay in like new condition to have a fun shutting it once a year. They have great value for $$ and very good ones to start and learn medium format with low $$.