It lags alright. It is not a high end product. The interface does have the resemblance, but the reaction time not much though much better than similarly priced android devices out there.

I personally wouldn't recommend it to someone coming from the Lumia family. If youre looking for a backup phone, just stick to the Lumia family.

But if you're trying to recommend people to the Nokia brand, yes it is a good choice. It offers the most bangs for the bucks.

As far as the app is concerned, you can download a third party app market which is available in the Nokia store, and look for the apps there, if it is not available in the Nokia store. Or just Bing the apk.