I have had my band since 2010! Not one single regret AT ALL!! I had all these questions and concerns (I still worry) mainly b/c I work in the operating room and see all the complications! If you "you tube" the surgery you can watch the way they secure the band by pulling up and suturing the stomach around the band! One of the most dangerous complications we see in surgery is erosion which can cause infection!! And that is almost always from overfilling and purging. You have gotten this far and want this for a very good reason, do what you feel is right I had a hard time accepting that once I could introduce food into my diet again after surgery (by this time swelling is down around the band) I was hungry, and had very little restriction! Wait till you get a full or 2, I actually had to have some taken out on my second fill, my "sweet spot" was easy to find, LOL
Best of luck, you'll do great, and I have read some awesome advise on this board about taking the time to understand your relationship with food!!! Very important... The past relationship and the future one!!