I googled "Lend Lease M-3 Grant tank" and the third entry was "Soviet Opinion Of Lend Lease Tanks". The original Russian text document comes with a translation. They did, indeed, get the M-3 (in the US the Lee, in Lend Lease versions, the Grant). They though little of them and the document cites their shortcomings. They had mixed feelings about the M-4 which the document does not call a Sherman. It is interesting to read what the Soviets thought about armor as they put so much of their resources into armor.