You definitely don't want it too tight! I went through that once and don't ever want to do it again!!! Threw up all night, couldn't sleep, very painful, don't do it!!! Make sure before you leave the dr's office the Water is for sure going down, make sure you drink enough of it to know, cuz you won't know if your pouch doesn't get filled all the way so it's uncomfortable and then if it doesn't go down you'll know.
Now with that being said it took me awhile to get my fill right but even before that I would lose some weight right at first and the thing is all those few pounds do add up after a while. I'm 1 year out and have lost 66 lbs. still need to lose 35-40 but what a difference and I know for sure the rest will come off! And really after all these years of being fat with nothing happening year after year one year is not that long especially when you know it's not coming back on! I have (what I thought were) skinny clothes that I saved for when I lost weight and guess what, they aren't so skinny and are all too big! Really hang in there and make sure you walk or do something cuz it really helps too!