As already mentioned in a previous review, the instructions could be better. That said, it doesn't take long to work it out, after all, there's only 3 buttons - how difficult can it be?
Another reviewer complained about taking off the back with a screwdriver - this is misleading - no tools are required and the back simply pulls off with a little twist.
My son loves it. It tells the time (which can be seen at night as it lights up when moved), has an alarm and tells the temperature - exactly as the description tells you. You can also set it to speak the time. For less that 4 quid you can't go wrong...and it won't lose the time in a power cut.
I would give this a 5 for the fact that my grandson loved it and it cost less than 4 pounds, but the instructions appear to have been run through an automatic translator and then not proof read. During the short time I was able to concentrate on the problem I never managed to set the time, now I am back at my own house and tempted to buy another one just to solve this. If anyone has the answer, please post it and give a 5. Thank you.