I've known more than one person who used some amount of methamp to help them through withdrawal. I've found it helpful myself, but I can't tolerate anything but low doses. I also would take sleeping pills to counter the insomnia, although once I only had melatonin, cannabis and a little booze and sleep while kicking was fine.
The right dose of methamp would take away 90% of the symptoms of acute withdrawal - again at the right (low) dose. Sleeping wasn't super easy, but considering how active I was while under the influence of the speed I was pretty exhausted by sleepy time (and cannabis/etc helped me sleep). Too much methamp definitely is uncomfortable during detox, and I don't want to think about not sleeping for the entire acute withdrawal process (or how horrible that is for one's health).
I've a lot of mixed feelings about using methamp to help detox. If someone has to be productive/work and doesn't have any other options, wouldn't necessarily discourage someone. It is an effective enough way to remain productive and more or less alert during the acute withdrawal stage, but it doesn't necessarily set anyone up for success after that.
For those who enjoy it, it is probably not the best idea. And in any case, I can guarantee you there are better options out there than methamp. It's a last ditch effort, just above or around high dose loperamide use in terms of potential for harm.
Someone should only consider using methamp if they (a) have no other options of comfort meds and (b) have stuff they can use (not alcohol pls) to avoid insomnia. Not sleeping during the kick is a really unskillful choice, requiring more time for the body to heal post-detox.
And that doesn't consider the possibility one might like it so much they end up with a new habit (note that never happened to me or anyone outside one person I know who's tried it, so YMMV).