nickynat

You need to be able to get your nutrition in which is why they say usually take 20-30 minutes to eat. You want to be able to chew, chew, chew so you do not have large chunks going down. If you eat fast or not chew well, you can get stuck, end up with the PB's (productive burps), throw up, and the one I think I hate the most is where your mouth feels like you have a hose filling it up with fluid until you get unstuck (sliming). Getting things stuck is not pleasant, it is a fact of the band when your not paying attention. You want to take it slow with foods as well, because something might agree with you one day then it might not another. It can also vary with each fill that you get and it can cause you to have the above symptoms. Things like weather, stress, water retention etc can also affect the tightness of the band.
Honestly it will most likely be trial and error when you first start. At hardly any restriction it might not cause you any problems but when you get filled and start to feel a restriction then is where most of this stuff can happen.