First off take a deep breath and realize on the internet you can't always believe everything you read. Part of the issue with message boards and internet sites is many of the people who report are those with complications. I understand fear and regret, I had some myself but this is literally the best choice I've ever made. I've been overweight since I was 12, morbidly obese most my adult life and now for the first time in years I have my freedom back.
I had the sleeve 12/30/16. I've had no issues with my surgery and my recovery was smooth and as easy as to be expected after major surgery. My physical pain lasted about 2 weeks with minor aches lasting about a month. I returned to work at the 2 week mark and other than being tired, I had no issues going back to work. The worst part for me was the gas pain, which you can help minimize with gas meds and walking as well as pain where my drain was but that was removed on Day 2 post op. I also has nausea on Day 1 but that is a side effect of anesthesia for me and had it after every surgery I've had.
I was allowed to begin sipping about 24 hours after surgery and had no issues taking small sips. I had no swallowing issues, no pain with swallowing and have yet to have an issue eating or drinking as I move through the stages. I did have some minor heartburn early on and was prescribed Protonix once a day for 3 months. I no longer have had any issues in terms of heartburn. It's was a minor issue for me and taking a pill once a day didn't effect my life negatively or set me back. To this day, I've been able to eat almost everything I did pre surgery (though I chose to avoid unhealthy foods). I've also been able to tolerate straws, caffeine and carbonation with no issues. I also enjoy going out to eat on a regular basis with my friends and family.
I've lost 101 pounds so far and wouldn't change a single thing. I had no co-morbidities but it would have only been a manner of time as I was at the highest weight of my life. My lab work (blood sugar on the climb, cholesterol was high, thyroid was off) was not great the last time I had a physical and my body ached. Now I'm in perfect health, just had my yearly physical and I was 100 pounds down since last year, my lab work was perfect and I feel 10 years younger.
As for sleeve effectiveness, I have not heard that it's not recommended for weightloss. In fact at my clinic it's replaced all over forms of weightloss surgery in popularity. I have people in my local support group who are 3-5 years out and have success still.