Orange Stockholm is the Huawei U8160, the same model also sold as Vodafone Smart and T-mobile Rapport.
I largely agree with Arthur Dooley's review. I did substantial research before buying this phone. I wanted a budget smartphone with the flexibility of pay-as-you-go. However, I must admit that as a previous iphone user, I have found one characteristic of the Stockholm frustrating enough to be a deal-breaker: the snail-paced processor.
As Arthur mentions, the screen is small. This can be partially worked-around using alternative keyboard apps. I found the built-in screen rotating feature of the Stockholm unreliable. (It flips 90 degrees sometimes without you having tilted the phone.) The phone has several features appealing in a budget smartphone: wi-fi, GPS, Android, built-in radio.
But all of these nice features are overwhelmed by the very slow processor speed - indeed it makes using them require zen-level patience. Booting up the phone takes 4 minutes. More alarmingly, adding a contact can take over a minute of 'thinking'! At this point I am digging through my pockets for pen and paper. Part of the problem is that Orange pre-installs a host of software that you cannot delete. Switching from Orange's launcher app to a free alternative (such as LauncherPro) improves speed noticeably, as does frequently checking for extra processes and shutting them down.
But at the end of the day, I want a smartphone that works without constant monitoring and managing. I would encourage looking at other budget smartphones (perhaps from trusted brands) before purchasing Stockholm (or its equivalents on other networks).