I bought this rather than an 8-channel XLR box because the jacks allow one channel to be used as a return to stage for the mixer output. I also have some adaptors which allow XLR balanced signals to run through the jack channels.
I'm a light user so I won't commend on durability, other reviewers seem to think it's OK for the price (and it's a good price)
My LR Baggs acoustic guitar pickup seems to work pretty well plugged straight into one of the jack channels but I would tend to use a DI box, hence the adaptors.
This allows me to run a 7-channel + return PA or a 8 channels with a separate cable for the return, which is enough for most acoustic gigs. Much nicer than lots of long leads, even when the mixer is close to the performers in a pub or cafe.
I should have bought a cable reel with it and Thomann do a good cheap one which allows you to wind the mixer-end tails round a second external reel for tidiness.