I haven't seen the HK, so I can't compare, but the Philips I had also would do a 'split screen' effect in pro-scan mode. Switching back to interlaced and back to pro-scan fixed it, and apparently going into and out of the menus did as well. Once playing it would be ok.
I had some popping sounds when in the menus, the image looked overly stark and harsh - it was difficult to calibrate and gave a dark picture, so I had to tweak by eye in the end. It has a sharp picture, but enhanced any film grain/mosquito noise. I wasn't impressed with the image on my projector.
It posterised very badly too - not a gradual change in colour but distinct bands. Not something I expected from a machine at this price point.
I think there were some other issues (see the huge thread), so that when I returned mine, I asked for a refund instead of a replacement.
I tried a Limit, and a Toshiba SD520E. The Tosh is by far the better of the 3 (with my HT1000 at least), but no PAL progressive, just NTSC.