I picked up the Insignia BD player for my dad last week and had a chance to set it up and try it out on the 4th; just getting around to impressions now though. I have to say the impression I got was better than expected. The player is rather simple; almost looks like a VCR, with only a few buttons and the tray on the front. It isn't particularly heavy, but it does feel relatively well constructed. The back has only a few connections - HDMI, component, composite, coax/optical and power (sorry no pics at the moment). The remote is extremely simple, and actually looks a LOT like a knock off of the PS3 BD remote (IR though). Setup was extremely simple, since my dad doesn't have a HDMI receiver yet - only had to setup video output to 1080i for this particular older Samsung LCD.
We fired it up and played I Am Legend to try it out. My dad always commented "My eyes aren't so good, I don't know if I will even be able to SEE the difference." After about an hour, I asked him and my mom if they could see the difference and both of them without hesitating said "Definitely". My dad likes action movies, so I gave him his first BD with the machine, Predator. It isn't one of the best looking discs out there, but it still looks much better than the SD DVD IMO, and he still enjoyed it.
For a basic, budget player, I have to say this one looks promising so far.
The only disappointment I had was the in-box coupon. It said $100 in discounts, however it turned out to be the typical deal: $10 off, but you have to buy TWO movies of the ones listed on each coupon, and some of them have a few of the same movies on them. Some of them have decent choices, others not so much.