I know it's against the clock which should mean it is less relaxing, but I find it great for switching off from work and de-stressing. There are half a dozen games and some I like more than others. I also love Ocean Rainforest, which has another half dozen games.
On the downside - I turn the sound off because I find the music irritating. Plus the main negative for me is that you can't assign a name to a score, so you have no idea who got which score in the high scores lists.
If you like Touchmaster and Jewel Quest you will probably like this. However, there is no story or progression through the Zenses games like there is in Jewel Quest Expeditions, the Zenses games are all stand alone games like in Touchmaster.