I own 5 curling devices 
From super cheap £20 to £90 ghd ones.
The Babyliss curl secret is good if you're useless with wands / tongs. But mildly terrifying it eats a section of your hair. I didn't find it quicker or better effect that a wand.
Babyliss 2667U Secret Curl Styler https://www.amazon.co.uk/dp/B00FCBVE0C/ref=cmswwrcppapiii_YL-jCbYW6QFQ5
The ghd curl creative I bought as my last wand, it is great in that it heats up instantly, and the barrel isn't a perfect circle so does waves well. But they don't seem to stay in as well as my other wands.
ghd Creative Curl Wand https://www.amazon.co.uk/dp/B07G1CJC3T/ref=cmswwrcppapiii_eN-jCbNQDWP9G
My favourite for loose waves is
http://www.argos.co.uk/static/Product/partNumber/4025311.htm
They stay in well and aren't tight curls.
For tighter curls I have
BaByliss Ceramic Curling Wand Pro https://www.amazon.co.uk/dp/B00BFQ3RSK/ref=cmswwrcppapiii_0P-jCb7X0GS30
Again stay in well after.
And then I have a travel one, a Remington I bought on a whim on amazon offer that I've hardly used.
With the wands I usually always burn myself at least once. I can't wear the heat protector gloves as hair too fine and falls through them. A good hair day is when I haven't burnt my fingers. I have used wands when hair is above shoulder Bob to down to my waist.
For me I used a stay in type product whilst hair is wet, rough blow dry, make sure hair 100% dry and the. Put hairs into three sections (bottom/middle/crown) and the tighter the curl depends on barrel size and also how much hair you wrap. Once you finish a section spray with hair spray but don't comb fingers through.
When all hair done leave as long as possibly before combing fingers through.
My favourite would be the tresemme one