About lockscreen
There seems to be lots of confusion about how well the lockscreen mode works, so here is some clarification.
The lockscreen mode is an experiment about if we can make a working secure lockscreen to Android. The fact is that the Android does not support custom lockscreens so the implementation of this mode is more or less a hack. And because of this, the performance will vary greatly between devices and firmwares. On some devices it works fairly well and on some it doesn't. We will of course improve it if we can, but it is likely that it will stay more or less imperfect until Android officially supports custom lockscreens. This mode should not be considered as the selling point for Plus version, but an additional bonus to all the other cool features in the Plus version.