Sub n up Vs. low B string?

I recently picked up an Ibanez Mikro 5 (GRSM25), having an awful lot of fun. In an Ideal World I could just get a nano pog, but I'm not made of money, especially considering that I'm getting into a new apartment in 3 weeks. I found a Sub n Up Mini and a DOD bass envelope FX25b for a cumulative smooth $100+ship.

The reputation of the Sub n Up does seem to be promising enough, but can anyone vouch for playing a fiver on this thing? Also, can anyone speak for tracking on chords? I'm trying to avoid OC2 type octavers that don't like chords.

Just confirming before I make a purchase. All in all tho, I do hypothesize that I am looking at a funky good time.