Oh, you are on a very slippery slope...😱
I should know, b/c two months ago I did the very thing you are contemplating: bought a (really nice, black) bessa T from another member, as a back-up camera to my Canons. Then, I saw this really nice looking 50/3.5 coated Elmar on eBay and thought "well wouldn't that be a neat lens to use w/ the T?" and got it for a good price... and then there was the case, and a finder...
OK, to answer your question: I am still learning the ways of this camera, but its small size and light weight make it a handy second body. I took it w/ me for this purpose on a recent trip to Yosemite. I mounted a 28 on it and kept a 50 on my Canon P, and enjoyed not having to stop and change lenses. The one catch has been the accessory shoe, which can become a little loose; and you also need to be a little careful in stowing the camera w/ the accessory finder on. But I think it may serve well as a lightweight travel camera, on its own as well as as a backup. The body is not much larger than a Canonet QL17 GIII, but of course can use LTM or M mount lenses. A T w/ a 40 Rokkor, Summicron, or CV... THAT would be a nice travel combo!
A number of members here have the T or have had it, and it's been generally well reviewed. They may be able to speak from greater experience than I can.