Two differents generations of all-in-one spaceships/rovers : On the left, an old ship I built revision after revision, it's pretty big and has a lot of parts, but it still goes pretty well. It can hold 2 kerbals, so I used it for my Mun saving a long time ago. I've stopped using it since I built the new model on the right, but I still have some versions of it on the Mun, Eve, Duna and Laythe. On the right, the new one I've been using for about 3-4 months now, 1 kerbal, much more compact, optimized in every way, like the solar panels deploying exactly between other parts, the ladder (on the back, visible on the last picture) deploying only a few cm above a retracted solar panels, and a complex multi-ion engines system that can generate from 100 to 1200t of thrust depending the configuration (accessible with 6-9 keys, shutted down with 0), allowing to fine tune exhaust power at landings depending the gravity (soo much usefull on Gilly...). It also has, like the old one, some top engines (accessible with 3-4 keys, shutted down with 5) so that I can do a reverse thrust without rotating the ship. It has been slightly modified since this picture taken on June 28th, but these are just minor upgrades like some antennas and lights. You can see the latest version on the 2 last pictures, on Eve. This ship has landed on almost every planet and moon with a solid surface on the solar system, replacing old or automatic vessels one after the other. I would say its only problem is that you have to be careful with brutal accelerations when in rover mode, for its not really long for its width (unlike the old model which despite its height is very stable on its 8 wheels). But this can be avoided by slightly engaging the small top engines, and I don't want to add more wheels for it would then be too big and with too much part for a 'compact' rover of about 10t.