I recently purchased the HP Stream 7 because my laptop was cracking, and I needed an inexpensive way to access my digital textbooks on campus. I chose the Stream largely because of the inexpensive price and also because I liked that it ran Windows 8, meaning I was already familiar with the operating system. Other low-cost tablets come with very limited and/or unfamiliar functionality, and I wanted something I knew I would have no problem pulling up PDF files, school lab reports, etc. on.
The tablet has overall been very useful for me. It isn't a laptop, so there are expected limitations, such as it being much more time consuming to type on it. I also wish the screen were bigger. But for the price I paid, it's been getting me through the rest of the semester just fine!