How often do you normally water?
Does it attract bugs?
Does it come loaded with nutes already?
Any thing special i may need?
Is there a major PH fluctuation?
Who prefers what brand and cut of coco?
So far I have had not ONE problem with bugs period, I am sure that you could have problems with them but I think it is less likely to happen.
Coco is a PH neutral medium, takes on the ph of what you put in. As long as you are checking your PH before you water your girls your ph wont change, as long as you flush the coco every couple weeks to wash out salt deposits that can cause nute lock if you don't. You have to add your own nutes, make sure your nutes are coco specific or else you will have problems.
I water mine every couple days, I know alot of people water daily. No matter how often you decide to water, always use the water to waste method. That is water them untill water starts to run out of the bottom. This is one of the beautiful things about coco is you CANNOT overwater your girls, it will hold what it can and the rest flows right out the bottom.
I would highly recomend atleast trying coco, you will love how fast they grow. I use coco blocks from Botanicare, they seem to work great