Positives: Bought for a 5 year old who did not dare get out of bed not knowing if it was time to get up. The alarm clock is perfectly filled role, my son now rises alone (from the first use). Not tried to week, but I do not doubt its effectiveness. The adjustment is locked by a key combination which prevents accidental deprogramming by the child. Negative points: Although a natural ease with electronic items, I found the inconvenient setting. This is achieved, but it did not retain a time to another (especially if the plug is disconnected by mistake). The electrical cable of the transformer is a little short. The sliders are impractical and are somewhat fragile (the contour of the clock which serves as a button). The music of revivals (bleating, birdsong, beep) is not beautiful to the ear, probably due to the poor quality of the electronics or speaker.
CONCLUSION: The few negatives are easily outweighed by the functionality of this clock, which is for me the main thing. I hope the dual display digits / needles also allow my son to learn the time more easily. My son loves waking up and finds funny. Last thing, even if I do not regret the expense, I find the price a little high for a while plastic alarm clock ...
Update: After a few weeks of use, my son is still happy with his clock sheep. An additional negative point though: - You have set the alarm clock every night: the alarm setting is not keeping (for against, time remains programmed) !! Fortunately, it only takes a few seconds and adds to lay the ritual.