So glad the first One10 finally made it through Russian customs! Your perseverance in not giving up and waiting until it could reach you instead of getting a refund from BF really paid off. Congrats on the One10, and future One10.
It's an awesome cab. Played a cocktail bar gig with mine last Saturday night. I have a tophat in it so I can pole mount it on a small pole; it's a great way to take full advantage of the "personal bass monitor" type set-up. At the risk of sounding like a "you should do what I do" guy, I recommend the tophat/pole mount option. $60.
I also used my Big Baby 2 in a Sat. afternoon outdoor gig; I hadn't been using it routinely since I got the Four10. It sounded great, and I was reminded of how truly awesome it is. I think for me I'll be using the Four10 for Jazz Bass type gigs ( I am playing a lot of jazz-blues these days) and the BB2 with my more modern-sounding basses, and for outdoor stuff. BB2 of course also sounds great with a Jazz bass, but the Four10 is a perfect retro-ish sound cab. And of course, I will continue to use the One10 for a wide variety of smaller gigs, of which there seem to be many. The biggest discovery of my short time on TB has been Barefaced cabs (Sire basses would be the 2nd best discovery). I used to be content with average gear until I came here. Oh Talkbass, you are a cruel mistress!