When I bought a new CZ 527 in 7.62x39 from Tenda I found a 3"+ crack running from the mag well bolt hole diagonally toward the for-end. When I contacted Tenda about it they hummed and hawed about it so I contacted CZ directly. The next day I was told to go to Tenda and pick up my new stock, which had even nicer tiger stripes that the original! (And CZ let me keep the old stock, which I repaired, bedded, and added brass pillars. It's now the "hunting" stock.)
Can't complain about service that good, that fast, so I bought a 455 as well.
I'd say!