[Dell Streak 7] Z4nd4r:
My personal advice: get it! I love this thing, and I'm on FroYo (I might upgrade to DJ's HC 3.2, but we'll see).

There have been a lot of posts on this, but I know it can be a pain to wade through the forums so I'll summarise the good and bad for this device.

The Bad

Might as well get it out of the way.

First, the battery. It sucks. This is my main device (computer, phone, camera, etc.), which puts me in a pretty good position to rate this. It's livable if you're OK with frequent charging, but if you're going to go for long stints away from a power supply and with heavy use, this is a dealbreaker. If you're normally near an outlet, this is simply an inconvenience.

Next, the screen. It's definitely not up to snuff with the likes of the Nook Color or the Galaxy Tab series, but it's really not that bad. It has one viewing angle that's pretty poor ("down," in portrait mode), but it really isn't a bother. Long and the short of it: you won't notice if you don't have it next to a Galaxy Tab (even then; my wife has a GTab 7, and I like the contrast better on the Streak7 screen).

Next, in the inimitable words of Steve Balmer, DEVELOPERS DEVELOPERS DEVELOPERS DEVELOPERS! I used to have the OG Droid, which was one of the most developed for devices on the planet. The Streak 7 is one of the least. This may or may not be an issue for you.

The Good

This is a bit broader of a category, and, of course, varies by model.

First, the T-Mo version has 4G. This is incredibly nice and puts it ahead of a lot of the other guys out there.

If you're on the WiFi version, you can disable the cellular stuff and greatly increase your battery life (I do mean greatly; cell standby is the number one battery drain on this device). This isn't exactly a "pro," but it does negate a con if you're going WiFi only. You must be rooted to do this, though.

The processor. Oh, the processor! Tegra 2 is a phenominal little SoC. Don't listen to the detractors (who rely mainly on crappy benchmarking software; there are no good benchmarks for mobile devices right now- not Quadrant, not Egypt, etc.). Think of it this way: the Snapdragon may not have been the "best" of the smartphone chips in the last run of single core phones, but it was the reference hardware. Thus, almost everything ran faster on it due to being optimised for it. The same goes for the Tegra 2, which can be found in the Streak 7, Moto XOOM, Samsung Galaxy Tab 10.1, ASUS Transformer, and on and on. All reference hardware from Google (basically, the XOOM and GTab 10.1) run Tegra 2. Everything I've seen works very smoothly and very quickly.

Cameras. It's got two. Don't expect stellar shots, but the quality is head and shoulders over the iPad2 and it also has a flash.

Gorilla Glass. Enough said.

Size, if it's what you're looking for. I prefer the 7" size because I take it everywhere with me. If that's not an issue for you, you might prefer the 10.1" models. Even without needing portability, though, I think I'd still opt for 7" (I know; that's what she said).

Full size SD card slot. This is great for reading camera memory, purchasing an extra card for media storage, or just saving cash on a second SDD for use as dedicated memory.

Vanilla Android. In it's stock form, the Streak 7 runs a skinless version of FroYo. It can't really be overstated how welcome this is for the type of people who crawl XDA.

Well, that's the long and the short of it. Is the Streak 7 right for you? Maybe. Depends on your usage. I got a Streak 7 for me and a Galaxy Tab 7 for the wife. We both wanted the 7" size, but she benefits more from the long battery life, nicer screen, and even TouchWiz (yes, there are people out there who find it useful). The Streak7 would drive her nuts, but the Galaxy Tab would drive me nuts. Different strokes, you know?