I personally have one. I have ran about 5k rounds their mine. Mostly steel cases corrosive such as brown bear. I have never had a single issue with it. I do not know about others experience with it. I am unable to give you a price estimate because I got mine for my birthday from my grandpa years ago. I enjoy shooting the crap out of it.
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Maddi is well built, the MAK 90 was crude but the Maddi was very nice, well built with good fit and finish for a gun imported during the mid 1990's, As I remember having one those $40 Chinese 75 round drum's in it, it wsnt happy with it, it performed very well with East German 30 rounders