i just bought 2 x j-stiks for my cab and I really like them.
you can adjust the "feel" a little by turning over the restrictor plate, which can alter the throw a bit. they are 4/8 was adjustable, from underneath., as well.
at first, I did find myself hitting the diagonals too easily in 8 way mode (which played hell with my robotron firing) but you can adjust the microswitch levers carefully with pliers to adjust when the switches "switch". tweaking this slightly has improved this aspect no end. and it now performs as I expected.
i understand you can make it stiffer by pulling out the spring and stretching it a little as well. (ouch - that sounds odd when I write it down

)
They seem very well built and solid, and are comfortable to use.
I have no experience of the t-stik to compare, but I would recommend, for sure.