I got both the 100 W and the lighter-weight 60W, so this review is a comparison. I would have just bought the 60W first, but it was out of stock, so I bought the 100 W one; then the 60W became available again a day later. Thanks to Prime free shipping, I figured I would compare them and keep the one I thought better suited my needs.
[NOTE: maybe because the 100 W is so big and heavy, I could only get totally free return shipping by taking the panel to the nearest Kohl's store. To bring it to UPS for returning, the shipping would have cost $12. That surprised me--I've never run into it before.]
The 100 W is sturdy, solid, has the capacity to charge off 2 built in USB ports directly. A very well designed panel, I liked it a lot. It is pretty big, and would take some wind without being bothered. It weighs 9 lbs.
The 60W is much flimsier. It weighs only 3 lbs. It would blow around in a lighter wind. It has no way to charge anything off it directly, only the hookup to the Jackery battery power station (I got the 240. Love it.). The 60W is also $120 cheaper than the 100W. You can see why, when you sit them side by side. There's just less to it. But it does its job perfectly.
Both have a zippered pouch for storing the connection cable right with the panel. Both have kickstands that help the panel stand up at an angle. The 100 W is more secure with its two kickstands than the 60W is with its three parts and only one kickstand; but you can put the battery behind it to help hold it up, which also keeps battery out of direct sun. The 100 W holds itself closed with magnets. If you want to carry it with one hand, you'd need to buy the separate case. The 60 W has snaps and becomes a sweet little portfolio type thing with a handle. You can carry both it and the battery station easily with one hand.
So it all depends what you want.
I set them up side by side and used the battery station as a meter. Under the same conditions (sunny day in November), the 100 W was putting out 63 Watts, the 60 W was putting out 50. (Other reviews say the battery charges at 43 W, so each would work equally well if that's true.)
One other time I tested it, the 60W panel was putting out 52 watts. Good job, in weaker autumn sun!
I'm keeping the smaller and less expensive 60W one. I like its lightness and smaller bulk, and I don't think I'll have many occasions when I would want to charge something and not have the battery with me. (But like many others, I wish that Jackery offered an adapter for the plug that would let you charge from the 60W panel directly. )
Customer service says the 100W will charge the battery quicker. On an inefficient/less sunny day, I'm sure it would make a difference. You could also charge the battery and your phone or whatever separately and at the same time. It's a terrific solar panel. I give it 5 stars because it's just personal preference that I want something less big and heavy.
I give the 60W one 5 stars too. And am very happy to have it on hand to be better prepared for the next outage. Unless it happens in a winter storm, in which case any solar panel would be useless--but I'd still have the charged up battery to get me through at least a couple days of being able to stay quite functional.