Personally, I loved it.
You should never really ask what /a/ thinks. If it doesn't have massive loli characters, /a/ will hate it. Case and point, lucky star sucked ass. /a/ loves it only because it has tons of lolis in it.
And some stupid reason, /a/ kept comparing Renton to Shinji(EVA) back when it was airing in japan. I honestly think Renton is the opposite of Shinji. Even though they start out the same, Renton proved to be GAR in the end while Shinji was emo.
The only way you'll know if it's worth watching, is to watch it yourself. Don't listen to /a/ or to me. Just fucking watch it.