Who likes or not the Meisterstuck MontBlanc pen? What are your experiences with the pen?

I bought one and I'm not thrilled with it. Initially it worked well . . . then it started to have period where the ink wouldn't flow properly, so I took it back to the shop to have it repaired. When it came back it worked okay for a little while but now it makes ink blobs on my paper. I'm thinking of taking it back again or trying for a refund.