Please read this review, because if you're considering O2, you shouldn't be.

When it comes to gaming, the lag is terrible, for most download services the ISP caps terribly (I've run tests to check this, a speed test reveals about 500~KiB/s, whereas downloading from Steam would go at about 3.2KiB/s, and that's too selective to be congestion) but that's not all.

I'm well past the ADSLMAX tests now, and I've noticed that whenever I'm doing anything that uses a tiny bit more bandwidth than browsing, the results are almost always the same.

Gaming: Disconnects.
Downloads: Disconnects.
Skype: Disconnects.
Watching videos online: Disconnects.

And these disconnects can leave me without any form of Internet from between five minutes to half hour, it's unbearable and it's driving me insane. I had better service from Tiscali, back when I was on dial-up and they disconnected every two hours! Yes, better service from Tiscali! It's THAT bad, and worse.

I was on an ADSLMAX service before I switched to O2 and it was incredible, I saw none of this capping or disconnects, which proves it's entirely on O2's end. The reason I switched from my last service is because they went from being an unlimited service (they couldn't afford to be any more). Everything I'm seeing is what O2 is choosing to do, and it's terrible.

They're not providing the service they promised me (and the endless, continuous disconnects especially are the largest breach), so I'm going to see if I can get out of the one-year contract. PROTIP: I was a sucker, notice the one-year contract, it's so that they can sucker you into a terrible service for a year. I feel furious about this.

Trust me, no matter who you choose, don't choose O2, and don't choose BE's ADSLMAX service either, because O2 is supplied by BE Internet, so both are horrendous. So please listen, as I'm warning you now: AVOID THEM LIKE THE PLAGUE. If you don't take heed of this review, it'll be your own undoing.

I don't know whom to suggest in their stead, I don't know who might be better, but AOL's service is stellar compared to this. I've never seen so many continuous disconnects on one service in my life, and I've been with the Internet for as long as there has been Internet available in the UK.

So please, don't get suckered like I did. It's just not worth it. I'd give them bloody minus scores if I could.

(I'm downloading at 13KiB/s right now... and wondering when the first disconnect will kick in.)