Does anyone know where they actually are?
There is an address on their web site, but it's clearly not the place from which they operate (although their management office may be there). If you use Google maps' Streetview, the estate in question is barns converted to offices (or new build to look like that), not warehousing.
So I'm a bit puzzled about the operation.
I should say though, that I have quite a few of Rutlands items, and whilst I've returned stuff, that which I've kept is fine, including my 'Dakota' wet grinding system, similar to the Jet one.
On the original subject, I bought the Kreg K4 (not the "system"), but not from Rutlands - Axminster, IIRC. I am very pleased with it, not least because of the measurements cast into the plastics. Although the simpler jigs will technically do the same thing (drill oblique holes to a specific depth), I think they would be a complete pain to set up in comparison, unless you set up a very standardised jig. If you do a variety of work, you'd be forever fiddling about with it.