I don't understand all the mechjeb hate. I would not have learned as much about KSP so quickly without mechjeb. I would still be turning my kerbin launches at 70km if I didn't try out mechjeb, would never have landed on a planet outside the Kerbin system, done a spacecraft rendezvous and docking and I would still be designing rockets that are WAY too heavy for what they're supposed to do. I would probably not even have tried the science or career modes because I would have been utterly frustrated by the difficulty spike of interplanetery travel. Now I've sent probes all over the system and am working on building a manned exploration ship in orbit to explore Jool and it's moons. I could also now do most of what mechjeb does on my own (heck sometimes I HAVE to, since mechjeb has this tendency to shake really tall rockets apart during ascent), and can sometimes even do better than it. Mechjeb has smoothed the learning curve and showed me what was possible. Mechjeb is also great for automating repetitive tasks. Getting to the Mun is fun the first time, but gets boring once you've done it 5 to 6 times to grind science and experience. Same for mining operations on Minmus. It's consistency is also great when you're optimizing vehicles. It makes rocket tests very easy to replicate. I agree that there are parts of mechjeb that should be part of stock. The deltaV table during construction and flight for one. If there's any one thing that's given me the greatest insight into rocket design and flight in KSP it's the deltaV table. Understanding TWR and deltaV was the tipping point for me. It turned KSP from a game of just fooling around with rockets into an actual (if whimsical) spaceflight simulator. Mechjeb is a great learning and automation tool and I do not understand why people dislike it. Progress is, after all, built on the work of others, not by reclimbing the same mountain over and over.