I'm torn...
When I first started heavy-duty scrapbooking, I was told that Herma adhesives were the way to go, so I jumped on the Dotto train. And I loved it. I still think it's one of the best adhesives out there.
But I do have a problem with it. If you scrapbook quite a lot, you will find yourself spending lots of money on Dotto refills. They don't last long, and at $5 a pop, it seems that they should. And in addition, there were months during last year that I couldn't even find refills.
So, yes, this is one of the BEST adhesives out there, but take care to use it wisely and always keep a refill on hand. There's no worse disappointment than wanting to get crafty and finding that you are out of refills!