These are great as everyone starts playing with an equal stack, and it is just a mini tournament. Also can be an easy way to build a roll, if you have good bankroll management.
Sharkscope
Gives you a great bit of info about how soft a tournament is, through the tournament selector. And can also give you an idea of how the players are at your table.
You only get 5 player searches every 24 unless you subscribe, but the tournament selector is free to use.
Also doing a player search for your name, can reveal how well you are playing, what your ROI is, how much profit (or in my case Loss) you have made. And a lot of other info. Such as whether you are tilting or supertilted (i have that one
Some of the icons are pretty straightforward, Fish for easy, sharks for hard.
All in all, easy to use, and helps you feel confident.
Brett.