I installed UltraHal and PeoplePutty about two months ago.(on Window 7). I haven't had any problems at all with there operations. I tested everything.
Although I haven't installed the latest version of Hal; The one that modified which core to use. So Im still using the previous update.
I installed Windows 7 Ultimate x86 32bit on my PC.
My PC has an Intel Core 2 duo E8400 @ 3.00Gz 3.00Gz,
2 Gigs of Ram, NVIDIA GeForce8600 GT with 1Gig memory,
1200 Gig harddrive memory, and some cool looking fans [

].
The only problem I've been having with Haptek is with the Haptek ActiveX component. Whenever I used it in Visual Studio 2008 it seemed to be difficult to re-size. I also noticed when using Visual Studio 2010 Beta 1 that Haptek will not work at all, but when I used the Beta 2 version I could use the component, although it is still giving some very odd errors. I'm having to make an individual UserControl that will deal specifically with the Haptek component and maybe that will solve my problems. I hope in the final release Visual Studio will make it work [

].
Oh and Maybe (fingures crossed) Haptek will make an even better product... OR Robert will make a totally awesome Orge Engine... hmmmm.
I think Visual Studio 2010 is due to be released in March 2010.