not very, just shift control to enter midi mode and its done, but still, thats the easy part, it still means you have to have traktor open, have the “filler” ready in traktor, set it all up, beatsync it and whatnot, if you only have the 1 laptop it also means you either have to have both traktor and maschine squished on your screen which is hardly workable, or alt tab between the two, which can become frustrating. and then on top of that, on the mixer, you have to fade to traktor, then load the next maschine project, and spend about 40 seconds to a minute waiting for everything to load properly, and then reset the midi clock and make sure every thing is in sync. by the time youve gotten everything lined up properly, youve easily wasted 2 minutes between tracks, which isnt very practical.
i still use maschine out at gigs sometimes, i allways use the midi controller itself, but as for “maschine” as the hardware/software combo, i only tend to use it to add certain percussive or synth elements to my set, or basically to sort of replicate the “sample decks” on the S4 on my own setup. and once in a while, i might play 1 or 2 songs live from maschine, but its more hassel than its worth IMO. i definately wouldnt reccomend using it to play a full live set.
Maschine does however come with an exelent Ableton template, which works quite simmilar to the APC, and for certain things, i think its even better than the APC, with feedback on maschines dual screens for certain things. and since you can easily drag and drop audio and midi from maschine into anything, its quite easy transfering a whole project or several projects from maschine into ableton. plus then you can sidechain, and seamlesly switch between “projects” in ableton, since everything from all your projects will easily fit in the one ableton set file.
Im not too familliar with ableton, i have it, but have only used it on the odd occasion. At the moment its not even on my computer. Im more of a “traditional sequencer” kinda guy, like reason or logic. but for a live setup, ableton + maschine would be a killer combo. you wouldnt even have to use the maschine software itself, just whatever you make in maschine, drag and drop into ableton as a seperate clip, or use maschine as a plugin. you would definately “fix” all the downfalls of maschine this way.
Maschine is still great for production, and for getting ideas down real quick, but its pretty flawed as its own standalone live tool, and still has its flaws as a production tool aswel. Lets hope they fix these things in a future update 
What id love to see also, is kind of like what they did with serato and ableton… “the bridge” if they could do the same sort of thing with traktor and maschine. I mean NI already make both the interfaces and the software for both, they just need to figure out how to make them work together.