I think I can put MOST reviews into a nutshell by giving my impressions of why someone would or wouldn't like it:
1) First of all, every resort (and resort staff) has their up-and-down days. Therefore, no matter which resort you look into, there will be people who claim to have been mistreated in some way. BLT does not have a higher level of dissatisfied customers in this regard than any other resort. So, if you hear a "the front desk wasn't helpful" story, disregard it --- or at least realize that these stories exist everywhere.
2) Likewise, you will hear complaints about room cleanliness/upkeep for EVERY resort. Having followed these boards for years, I think that the complaints for BLT are less since the resort is newer.
3) This brings me to why people who like BLT really LOVE it. They love it for the location. It attracts the same type of person who is attracted to the Contemporary. They like the location, the convenience, and overall feel that it is a clean/crisp hotel with everything they need right in front of them. Plus, for many who don't like the "condo" style resorts like SSR, they enjoy having everything in one relatively "contained" area -- less walking.
4) Finally, here is why people DON'T like it --- and this totally depends on the person's tastes. While most of the Disney hotels have a distinct theme that carries throughout the resort, my experience at BLT suggests that the theme is "hotel." In fact, we met up with another
DVC family yesterday who used the exact same word to describe the theme: hotel. And when there really isn't a theme to match the other DVC resorts, you start to compare it to other hotels (outside Disney) that you have stayed at for much less money. So, if theming is a concern for you, then perhaps you will not like BLT.
We only stayed there one night before a cruise, and we liked it. Watching the fireworks from the walkway that extends between Contemporary and BLT was awesome. Although the theme (or lack thereof) did not appeal to us at all, we thought the place was really cool because we definitely had a "center of the action" feel with Magic Kingdom, the monorail, the lake, and everything else right nearby. I probably wouldn't choose to stay there again unless we were going to Disney with a family for whom proximity to Magic Kingdom was important. It just doesn't have enough of a "resort" feeling for me. For whatever reason, the Epcot villas (BCV/BWV) have a greater appeal to me because....
1) They too have the feeling of being in the center of the action...plus they are wedged between two parks we LOVE to visit.
2) They have more of a "resort" feel. I could easily spend days on the property, as well as walking from one resort to the next.
3) The theming is stronger. It just feels more "Disney" to me, and it feels like the Imagineers earned their paychecks when they designed them.