I just finished my uBITX the other day, in a cake pan for now so all cables are not ‘dressed’ as would be normally. Played with it a bit on 40M and it works; however compared to my FT’s 817 and 897 not as sensitive and a bit noisier though that could be affected by the breadboard nature of the build. Haven’t given it a real workout yet though.
If put in a decent enclosure I see no reason to not use it for an activation - but I would not choose it as a primary radio either, not until it was used and somewhat pushed in it’s limits a bit at the home turf first. I purchased mine for the recreation value and it was inside my fun money threshold and should make an acceptable back up rig