2.5 year old thread. . . .
I'm smoked Jack Herer in Amsterdam years ago, and it gave me all the sativa negative side effects, like racing heart, paranoia, etc. I did have a lot quickly, which was a mistake! Presumably this was the Sensi version. But yeah. . .its super potent and if you like haze hybrids, its a good one. Not the easiest plant to grow, it stretches a lot, can be a bit finicky in terms of nutes/conditions, and takes a relatively long time to finish.
Some have said that Sensi has long ago lost its original mother plants, and its current rendition of Jack Herer isn't as good as it used to be. Since allegedly Sensi now contracts out its ceed production, it wouldn't at all surprise me if the White Label version of this consists of the exact same beans at half the cost.
Sannie has an excellent inbred version derived from old Sensi beans, and his version (Sannies Jack) only costs a fraction of what Sensi is asking. IMO, this is a really good place to start.
If I remember right, the Black Skull version is also a (differently selected) inbred version of Sensi's, good, and relatively inexpensive. That one is probably worth a look too.
There are a couple of other version out there (Greenhouse, BC Bud Depot, Bulldog, Vision), though not sure I'd be interested in any of these.
Also, for what its worth, "Super Silver Haze" is somewhat similar to 'Jack Herer'; its basically a different selection from the same mother plants, so if you've got the coin, you might check out the Mr. Nice version of that.