Clicker training is great when used correctly. I think people have this misunderstanding that you're always supposed to have a clicker on you, or the dog won't listen. A clicker is simply a way of teaching tricks, commands or complex behaviors, and once the dog knows and understands, is no longer necessary. It's only used in the initial shaping of a trick or behavior.
I mostly taught Jackson without a clicker very successfully when he was younger. I didn't use a clicker until I wanted to train more complex behaviors and I find it helps him know EXACTLY what I want because the clicker is more precise than human voice and will always sound the same, and if your timing is right, they will know what they did at the exact split second is what you want of them. I have definitely found him to learn much faster with clicker training.
Check out Zakgeorge21 on youtube. I love his method of training and it's how I've always trained Jackson. He calls it "relationship-based training" but I also prefer not to label everything. Sometimes I use a clicker, sometimes I don't, our training is mostly based on mutual trust and communication.
You can see me using the clicker here to train a handstand. It's probably not the best example because this trick has been being practiced for over a month now, and I'm a little inconsistent with my clicks. Some also say you shouldn't be saying 'YES' and clicking at the same time, but honestly, it works for us.
https://www.youtube.com/watch?v=yPcYdqFJZzE
'Clicker training' really should be called something else -- like 'marker training'. Using your voice, saying 'yes', etc, is still essentially 'clicker training'. People have this misconception about a 'clicker' and that you have to have it on you at all times or the dog won't listen, but that's completely not the point.
Also, here, learning to cross paws (ignore my little sis singing, LOL):
https://www.youtube.com/watch?v=kK25foQBN1k
Intro to clicker training:
https://www.youtube.com/watch?v=W3Ix6G6T56Q