Those are the bare minimum in my opinion, and ok for your toolbag. But the 2 Chinese models on the bottom of the page with proper dies (be sure to get the right

Those are the bare minimum in my opinion, and ok for your toolbag. But the 2 Chinese models on the bottom of the page with proper dies (be sure to get the right dies for your connectors) are so much better. If you zoom in to the images, you'll see they have a little step in the die. They also ratchet and hold in position. You squeeze them a few clicks, then you are left with a perfect cavity that holds your connector in place, leaving you with a hand free to insert the wire. Then ratchet the rest of the way closed, and they automatically release. They are spring loaded in a way that they have consistent force, they can't be over-squeezed. For $10-20 each, they are a great middle ground between the most basic hand tools (which also cost a similar price) and the official tools.