Now you are not going to fly the mCPx indoors like you can with the mSR, even if you have a fair amount of collective pitch helicopter flying experience. Even a modest sized back garden is not ideal for starting off with this lively little helicopter. It is liable to be off before you can get it under control and prevent it from finding the nearest wall, hedge or tree - and to be honest the garden pond is the biggest risk in our back garden.
Now one of the great advantages with the mCPx over larger more stable conventional starting points for entering into the collective pitch helicopter world is that you can have heavy impacts with little or no damage. You may lose a push rod, slip the main gear (or even flatten a few teeth in it if you do not cut the throttle in time - done that one too) and perhaps even damage a blade or blade grip if you have a really heavy crash. Most of the time you can just pick it up and after a quick check over, maybe push an odd part back together again and your off airborne once more. Try and do that after bringing a 450 size helicopter down. When you do break something on the mCPx you are looking at the odd pound/dollar to get a replacement and they are readily available.
So for the first time 'collective pitcher' I would recommend you do as I did and take the mCPx and find a nice wide open space, preferably on grass (of a little length for a bit of added cushioning when it comes down, as it will do to start with) and just fly it, fly it and fly it some more. You will be surprised how quickly you start to get the hang of it - I was, after being hopelessly out of control to start with. Just ensure that the helicopter is on a flat and level surface for take off, you don't stand a chance of getting it up if it isn't. You may also want to soften the controls, especially the cyclic controls, around the centre of the stick by adding exponential. This is easily achieved if you are using a quality radio unit like the Spektrum DX6i, DX7 or DX8 - I can not recommend them highly enough. With the exponential added the tendency to over-control the helicopter is reduced as larger stick movements produce smaller servo responses. Typically in the beginning we all tend to over-react, over-correct and over-control, which is the cause of a large number of our initial crashes.
To start with just stay in normal flight mode, you definitely do not want to go trying inverted flight early on. There is a definite knack to flipping this helicopter and even pilots used to inverted flight with larger helicopters find this one challenging to get inverted. You need to give it plenty of altitude, get a bit of momentum and be very smooth with the stick movements. Once you get it there you should give it a moment to let the gyros stabilize the helicopter. In some respects it is a great trainer for inverted flying because it is more challenging than many other RC helicopters. If you do it with this helicopter you are going to find others much easier. Plus, while you are getting it wrong you aren't going to be doing much damage.
OK, so it isn't the easiest collective pitch helicopter to fly. However, the challenge it presents will make you better at flying radio controlled helicopters and without doing much damage to your pocket. People who have flown this helicopter commonly report better collective management and smoother cyclic control for having done so. So why not master these from the outset? Then above all else they are a huge, huge fun helicopter. Agile, lively and with great power for their weight they are ideal for just having an amazing time flying - and best of all they allow you the freedom to do just that, to have fun, and to try things you might not with another RC helicopter because you know that it can take the mistakes.
My recommendation then is give it a go: take on the mCPx challenge!