I have the same price 20iger system are in the study and now sought an alternative for the garden. The solution of the portable device appeared with enticing.
Sound - significantly worse than in the 20s version.
Battery - does not last very long (3 hours) and when I unplug the unit from the mains at night I have to charge it the next day. Thus felt it depends on the power supply as long as the 20s.
What has annoyed me even more is the fact that the 2 remote controls that I now have are universal and have a good grasp - means I can not use them. Unfortunately, when I turn on the machine in the garden is the unit in the study also.
In order that no misunderstanding arises - the Portable is not bad - but the comparison with the 20s at the same price the device fails.
100 less and I would keep the device - so I trade it for NEN to 20s in the garden.