Summary: I purchased this computer as a Christmas gift this year, and for the price, it's definitely a good value. It has decent speed, though don't expect it to be as fast as any computer with a Core i3 or higher, and the HDD is plenty for most people (500GB). The computer came to me with a pre-installed Windows 8.1 with Bing. For those who don't know, Windows 8.1 with Bing is the same thing as Windows 8.1, but Bing is the default search engine in Windows Internet Explorer.
Summary: Computer works well, as expected. Would have preferred it with windows 7 rather than crazy win8. I find the wireless reception poor so much so I have had to put in a repeater, (even though the roku box alongside gets my signal fine) I was unable to decide from the description whether he computer came with a remote keyboard,which it does so I ordered a second one!
Summary: The Lenovo IdeaCentre Q190 meets my requirement. It's slow, compared to what I'm used to, but not any slower than most mainstream mid-level laptops. I'm using it exclusively as an HTPC, hooked up to a Pioneer A/V receiver and an old 60" LG plasma TV. It plays all audio and video files I tried (of course, this depends on the software used). 4K videos works well on my monitor but the TV can't handle it reliably (TV is not 4K). Noise is a non-issue.
Summary: The main reason for me to buy this box, was the very compact size and the detachable DVD-RW drive (all at a good price). Also I had read several posts on how the Q190 would run fine under Windows 7 -- IN FACT Lenovo provides (nearly) all drivers for this to "downgrade" to W7. Linux support also is good. -) Right out of the box, this is a NOISY fellow --> there are (freeware) tools to control the fan speed and after that it runs very quiet.
Summary: I use this as a media center for my TV. I can easily play HD videos and multichannel audio. I remove a star, because you can buy a decent low end laptop for less money these days. At this time it is only $10 difference to get the model with twice the hard drive and includes the DVD reader.
Summary: I bought this to run some software which controls a bicycle trainer. Yes, there is such a thing. The software isn't very demanding, so my needs were all about connectivity. I needed wired network, VGA output, and USB ports. Check. The remote mouse/keyboard was a huge plus, since it can be used in a room with no desk, or even from the trainer. Everything has started up fine so far, so I am very happy with this purchase.
Summary: I bought this to replace a half tower PC that sat beside my entertainment center that was used for videos and saved music. Its size caught my attention. The output of the PC goes to a Yamaha receiver/processor which drives the screen (a Panasonic plasma TV) and a set of speakers. The Yamaha also has a cable box and a BR DVD attached to it. After configuring how I use the Lenovo PC (VLC to play videos and a Logitech RF trackball and a RF keyboard), it works well.