This review is for the improved version which has phases of the moon at the top. It arrived quickly, adequately but not overpacked. The instructions were good but not withstanding setting up took some time as the latitude longitude need to be entered. However once set up and left to settle down overnight it works with no problem. I had the previous version for 2 or 3 years but the signal between the inside & outside boxes was very intermittent and got progressively worse until it was completely lost (fresh batteries did not solve the problem - I put the same batteries into this purchase as they had plenty of life in them). This is a better version especially as the irritating flashing pressure guage no longer flashes.