Well I have and I still do .........
As for the maint. issues with tube amps it's way overblown. Yes, tubes will not last forever, but 6-10,000 hrs for signal tubes and half of that or better for power tubes is a lot of musical enjoyment. As for biasing the power tubes, it's a piece of cake on the Rogue's. After the initial 50 hrs they required a small adj and have been rock steady ever since.