Mating Nucs, my trials in first year.
Use a standard 5/6 frame nuc.
Easier to manage all round and allows the new queen to settle properly into laying without disruption.
It's said this produces superior queens.
Ive just had a year of queen rearing and made my own mini mating nucs last winter. I converted new standard five frames in to half and milled down frames to fit. They worked well, but just like B + says, they tend to abscond if they get too full later in the summer if you get a hot spell. Mine were bigger than most and i found getting them populated was tricky at the start.
However i also used standard full sized Nucs and found that seems to give a more predictable result, with more room in the colony and less pressure on yourself to worry about overcrowding.
http://www.beekeepingforum.co.uk/attachment.php?attachmentid=12374&stc=1&d=1442528365
So this coming year, I am taking out the centre partition and converting them back to standard nucs and I am going to try the "miniplus"
http://www.golden-green.ca/bee-supply/mini-plus-nucs/
I really like these, because you can fit two mini frames together that fit directly in to a standard honey super for spring build up and population. You can then break them down and fill out the miniplus bodies, just like you would do when populating any other mating nuc. As the season progresses you can add one two or three bodies on top of the original, so you never get overcrowding.
You can also treat them like a nuc and requeen on hives by placing a whole miniplus over the top of a queenless hive and place a sheet of newspaper between the two. I prefer to catch the queens and use a push in cage, but the options are endless!!
Theres tons of books out there and if you want an easy method to use, then i personally think you should go for the Michael Palmer 10 plus 10 method.
Its all there to see and explained in depth when he did 4 talks at the national honey show in 2014. I used this method this year 5 times and i won't bother with anything else. Set it up so the bees do the work. After all as Mike says, their the professionals. Best of luck.
https://youtu.be/R7tinVIuBJ8