Not familiar with any game reviewers of the games, but I'll give my opinion on the arcade classics..
I have the namco pac and ms-pac, mostly for the extra games. One I bought for 50 cents and the other 8 bucks, used of course.
As far as I know, these systems are based on NES-on-a-chip, with a bit more dedication in the reprogramming
to use the original arcade game structure, albeit with a compromise of putting the scores on the
side for games that used vertical monitors. (most games covered by the classics series) Galaga and Xevious are exceptions to that.
The gameplay is pretty authentic, but there are a few glitches here and there that are only noticeable to the true gaming nut. Such as me.
..the music is a bit off on the games, like they didn't go to enough trouble to properly synthesize it (I have the NES Galaga,
and the music is dead-on as far as I remember, just the Bosses were a bit off color but I fixed that with a graphics editor
..the controls are... adequate. A real joystick helps the 'experience, but since most Midway games used a joystick on the left and fire button on the right, it's a bit
backwards. I took my .50 cent one and wired in a connector for my arcade control panel, which solved that problem..
On a technical level, there's some crossover noise from the video signal that bleeds into the audio on bright screens.
They really need a power adaptor plug, as they can eat batteries, especially if you forget to turn it off like I do sometimes.
Not had any interest in the other games they've put out, so can't tell you on that..
X-play might have reviews, but I doubt it. Browse the Amazon.com listings, often people will share their opinions on a particular game there.
Aside:
Overall, it's less complicated than using a computer emulation, but a modded x-box running Mame is the best to-tv translation, with the bonus
of running emulations of about every home console made. Legality may vary on that, of course.
If they ever bring out a trackball-based Atari classic arcade box, of course I'll be in line for the thing. Maybe petition the makers of the Flashback?
I'd love a Centipede-Millipede-Missile Command combo. But it's much simpler cheaper to bring out the software-based ones..