Bought the ultra watch and also the series 5. The watches are well made with exception of the straps. The straps don’t lock into the watch bodies so the strap slides left and right. It’s the same on both. The crown on the ultra skips quite often so jumps past the menu option. Apart from that they are very good and both have stayed connected to mine and my son’s phones. I have been wearing the ultra since Wednesday (now Tuesday) and the battery still has 12% left. If the straps secured properly they would be perfect, although they are much better than I dared to hope for. Hopefully they’ll keep going we do like them.