Hey bro, I have the GT-10 and love it, its my second one actually

Super great for worship. Seriously read the manual, multiple times if need be.
Also
*Run it in manual mode, set up the pedals in a way that is comfortable and makes sense. You then can run it like a pedal board, and us patches as slightly different choices, ie mod delay on this one dot 8th, analog delay on this one slap back, phaser on this patch, trem on that etc.
*Get a tap tempo, use it
*set up control 1 as a tap tempo, then set up your external tap as a tap tempo, this way you can beat the crap out of the external pedal, but still see the tempo blink on control 1

*You can get sick swells tones by setting fx1(2) on sub delay, into delay set at mod delay (or whatever your flavor) and all into modulated reverb.
*Use the modulated reverb, love the modulated reverb, it is so good!
*The pitch shifter can be use as a wonderful additive on swell tones, and as a fattener for big parts. The trick is to use it subtle, no more than 20 volume level, set the value on 12 or 14, also set a compressor before it for the smoothest possible.
*If you dont know what/how to use each of these effects in real music spend time studying and learning how
*The preamps can be tweaked to sound good, but if you can run into a tube amp by pass the amps and do this as much as possible, this way you use the GT-10 fr FX only, this is your best case scenario and how I use it most often unless I play a silent stage church, even then some will let you mic an amp from the next room and it will usually be worth it.
*If not the Fender pres and the JC120 are the best, after that you can probly get a little mileage out of the Matchless.
*Lastly read my blog teaching about the GT-10
*If you have any questions or need help you can call me or skype anytime. My number is one my site or you can PM me. Congrats on a great unit, pound for pound the GREATEST of effects in a multi box.