Last attempt was Mid Jan this year. I started with a a few days of a personally modified Bernese "microdose" method of Subutex doing appx 

Day 1 - 0.5mg Bup / 0.25mg Nalaxone w/ normal opate intake
Day 2 - 0.5mg Bup / 0.25mg Nalaxone  w/ normal opate intake
Day 3 - 1mg Bup / 0.`5mg Nalaxone  2x daily  w/ normal opate intake
Day 4 - 2mg Bup  / 0.`5mg Nalaxone  2x daily  w/ normal opate intake
Day 5 - 4mg Bup / 1mg Nalx 2x daily /w 1/2 Opiate use
Day 6 - 8mg Bup 2x daily w/ zero opiate use
Day 7 nothing 

I made it through the physical withdrawal but I had an extremely difficult time getting any appreciable energy and zero motivation, depression was very pronounced for the first time. My previous self detoxes had been feeling better day 3 with almost no depression. 