Ha, yes, I’d forgotten about the noise. The walls in our apartment were paper thin so you could hear when the neighbours went 
No, it comes on automatically a few seconds after the toilet’s been flushed
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We had one in the last house…worked a treat. Solved an otherwise very expensive problem and never missed a beat.
We have a macerator one in our 2nd home in Brittany. The previous owners installed a first floor bathroom and it is part of that. If they had not chosen a macerator then they would have had to dig up the concrete ground floor to run a conventional size pipe to the sewer. At least thats my guess why they did it, I m not them and I wasnt there at the time.
Its been no trouble at all.
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I have to disagree with the negative comments on saniflo’s . I fitted the cheapest one available from Leroy Merlin in 2016, for fitting in a newly created downstairs bathroom where access to fit a full size soil pipe was impossible. It gets used as frequently as the normal one upstairs ( possibly even more so) and in its 9 years of use has only blocked once when my wife flushed a cleaning cloth. The job of unblocking was no worse than any other job involving sewage- just get the gloves on and do a bit of dismantling. The toilet has provided exemplary service to date and I wouldn’t hesitate to recommend fitting one where only 40 mm waste pipes are available.
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The comments are mostly positive, from what I saw. Just be aware that some manufacturers exit the unit in 22mm pipe, some 38mm pipe so best to check before installing the pipe run. They can often benefit from increasing the pipe diameter if its a longer run part way along. Often there is a vertical pipe run first before the gravity section.
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I guessed it was 40mm but that is the UK size? So probably 38 mm, it was 9 years ago!
Its never that easy! Depends on whether its solvent weld or push fit 
I’m sure that’s correct. But still not something on my bucket list.
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Well, of course there is that, one can always use a bucket. 
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I did wonder why the coffee cups under the bed were so large?
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Ha!ha! Sounds like the old post hurricane days in Florida when the power was out for weeks and the septic tanks weren’t working because of the electronic equipment was out also. It was grab a 5 gallon bucket time. My inventive friends put small toilet seats on them! TMI??
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