I did too, with an old DN "superdish". There was very little margin for rainfade etc, and it would occasionally freeze for 1 sec. But still, it was working and was definitely watchable. And since i'm in the Northeast, that was with less than 20 degrees elevation. I have since replaced that dish with a 90cm.
The point is, 50-60cm for 125W is definitely too small for a reliable reception. But that doesn't mean that it's not possible (when the conditions are favorable)
Those dish size indications on the various sites are almost always overly optimistic, and quite misleading. On the other hand some people seem to think that anything smaller than a 120cm is unusable for Ku FTA reception... that's a bit pessimistic... Most Ku channels "can" be received with 60 to 90cm dishes but the smaller dishes are likely to lose reception during heavy rain or snow. Still better than no FTA...