Having read the previous review, my expectations were not high. However, the glass seemed good value if it did what it claimed. It certaily did. The button on the base needs pressing once to make the glass light up in one colour. When pressed again the LEDs go out. Pressing again brings on a different colour, which likewise goes out when pressed again. To get the glass to continually change colour you need to proceed through the above procedure until you have exhausted the various individual colour options, then the glass changes colour continuously automatically. The only down side is that the glass is rather large - but you don't have to fill it up in one go. It is not dishwasher safe, and the base needs unscrewing to enable the glass to be washed by hand. I wonder how long the threads will last? That said, it is a good buy for a party or for someone who has a tendency to overlook a glass full of red wine in half-light!