As a fairly new player (bought it after .20 was released on steam) only achieving a apollo-moon mission and a space station i took the opportunity for a fresh start (i waited for .22 and skipped .21). I think its a good way to challenge new players. It's not for veterans as they know how to build rockets and don't have to experiment to get anywhere, they just know already. I don't like some of the "parts" you get or better, don't get. Also, its sometimes not clear how to get the sience. Let me name a few things i run into: - no structure to hold the rocket in the start position...why? You start with the rocket resting on its engine. - counterintuitive experiment containers. you have to open the goo-container in space and observe, but if you close it again to make it safe for reentry you reset the container...yea, it took me a few times to get that. you have to return it in the open position (no heat gets in during reentry). - batteries come late, new players don't understand that you can use multiple engine stages to generate energy. That stops you from doing science, can be misleading, and you lose control of your vessel if you timewarp (no warning or anything). - it gets too easy too fast. basically, the first 2-5 missions are challenging if you don't have previous KSP knowledge, after that you are done in an instant. To master sience you just need antenna, solar panel, battery, struts and decouplers. After that you can build what you want (or your computer can handle), even just 1 large vessel and finish the tree. - no longterm sience. No probes i have to leave in space for a time to get the sience, no space station sience (leaving kerbals in space). no surface samples that have to gather sience over time...you get the point. I have to say i like the direction, but at this stage i will switch to sandbox+mods soon and "roleplay" sience. Sadly, in sandbox there is no working sience to gather points, even just for cosmetic purposes.