I just love 'Love Potion Gone Awry' stories. They are usually quite hysterical.
I enjoyed how you have developed the story for now and so far the characters are in canon. I really don't have any criticisms on your writing and I think you have done a great job so far. Keep up the great work.
This story has been on my top ten list of favourite H/G fics for a long time, so I'm really glad to see you posting it here on SIYE. I still absolutely love it. The characterisation is amazing, actually, and the H/G romantic angle is fantastic - I just wish JKR would take a hint from you! =)
"Potter, have you absolutely no imagination?
-Makes you wonder to what lengths Snape went to get a date."
Lol, sorry to quote one of your reviews rather than your story, but that made me laugh. And look at that scene entirely differently now!
Sounds like a promising start to a good story. I like how you're setting this up so far. Will it be poor Ginny or poor Harry? Or both get affected. Hmmm.... Can't wait to see how this turns out! Should be exciting, and you write very well, btw. I think your characterizations are spot on and you provide enough details to picture the scene. Nicely done so far!
This was really good. Very well written. You've really got the Hogwarts atmosphere going. I'm not sure about Harry shortening Ginny's name to "Gin" - it is affectionate but for all we know thats because Harry's developed a secret alcohol problem.
"My name's Harry and I'm in love with Gin."
Sorry, ignore my attempts to be funny. It's just my personal opinion. I really love the character development that you've managed to do - it really feels like a year and a bit has passed since OotP.
What fun! This is terrific! I just love the starting paragraph -- could practically picture Allan Rickman acting it out on screen! Anyhow, I didn't have a chance to read this during the fic-a-fest, so I'm really looking forward to following along on this here.
I think it is funny that Colin is now taller than Harry. It is pretty clear that Harry likes Ginny - my guess she misses it? I love the idea of Harry being forced to make a love potion. It was very smooth of Snape to come up with an Aurors use for the potion.
Great story continue to keep on writing fan fictions for you are great in showing the true character
Anyhow, I didn't have a chance to read this during the fic-a-fest, so I'm really looking forward to following along on this here. 
Cheers!