These cubes give a nice light - they have two settings: either changing colour or single colour. When changing colour, the cubes fly through each colour VERY quickly - maybe 10 seconds fade between colours. Unfortunately there is no way to slow this down.
But by far the most annoying thing is a bounce between red to purple, the cube abruptly changes colour - this quickly becomes very annoying and ruins the fade effect.
It is a shame, these cubes are very pleasing to look at with a nice, frosted, soft plastic finish. The image does not do them justice.
It you are looking for a single colour then these are perfect and will stop fading and pause whenever you press the button (meaning you can select any colour).
All-in-all I would recommend, but the fading effect is likely to disappoint I'm afraid.