Using the Boss AD-3 isn't a complicated process at all as it only took me a few minutes to understand exactly what everything does on this unit. The pedal has knobs for anti-feedback (with the ability to set the frequency), bottom and top (tone knobs), as well as chorus and reverb effects. The unit has two separate foot switches - one for anti-feeback and one for the chorus effect, both of which come in handy. The manual for the Boss AD-3 is pretty thorough and well put together, but isn't a necessary thing to have around as it is pretty easy to learn without it.
The sound quality of the Boss AD-3 is pretty good across the board, but isn't anything to write home about in my opinion. The parameters certainly do their jobs and the effects are pretty realistic, but I just see myself getting too much out of this pedal at the end of the day. This probably has to do with the fact that I don't like all that much processing on my acoustic instruments because I love the way they sound on their own! However, if you are an acoustic guitar player looking for a little spice for your live shows, this will add to your sound.
I first used the Boss AD-3 about a year or two ago and while it is good at what it does, I'm not a huge fan of the unit in the end. It is pretty versatile and the effects are nice sounding, but I've never seen myself using this too often. I would never use this for recording and I really just see it as a live unit if you want a little extra processing to your acoustic sound. If you are looking for a supplement for your acoustic guitar, I would encourage you to shop around, with the AD-3 being part of what you try out as it does have some things to offer.