Finished eden* yesterday. I haven't read anything since like November and I've became an expert procrastinator, so it took quite a while. Since this VN is coming out in 2 weeks, I though I'd write my impressions. Spoiler free.
Starting off with the negatives. The first problem I had was the with the very slow and boring beginning. I didn't get really "hooked" for a while. The really good parts started somewhere before the OP and oddly enough, after that point I just couldn't stop reading it. If you can get to the OP, you're basically home free. Plowing through the beginning is definitely worth it. The middle parts were just perfect, if it continued like that until the end I would have given it an even higher rating. Sadly, it didn't. The last part of the VN is way too long and it drags quite a bit, those sections should have been shorter. Other than that, I didn't like the Lavi character all that much. The was she behaved throughout the VN was a bit too crazy for my taste.
Next, the positive stuff. The music. Holy shit, the music in the VN is absolutely awesome. I don't think there's a single bad track in the whole thing. If you liked Ef's music, you'll be very impressed with this as well. TENMON and Eiichiro Yanagi did the music, the guys who also made Ef's OST. Another thing I should mention is the awesome backgrounds, probably the best I've seen. Breathtaking, really.
The writing was very good. While not amazing, some scenes made me cry like a little girl. That sort of thing didn't happen since Clannad. A big plus in my book. The overall plot didn't feel convoluted at all, it's fairly light. I didn't check the 18+ addon, nor I plan to, so I have no idea how that's like. Supposedly it adds "random h-scenes" to Memories, Eustia style, i.e., the scenes don't appear in the story at all, they are separate. That's a good thing since this is one of those VNs where you really don't want h-scenes at all. Also, Gotou Mai.
Rating: 8/10
After I finished this VN, I wondered who can I recommend this to. It's definitely not for everyone. There's this certain sad feeling throughout the whole thing, not a whole lot of comedy and I guess some people would consider it to be quite uneventful. If you're not fond of that sort of thing, better stay away. On the other hand, if you like "deep" VNs that don't have cheesy cliche bullshit, I'd highly recommend it. I think the writer from Ef who wrote Chihiro's route also wrote this. If you've read that, you'll know what you're getting yourself into.
Edit: I was wrong, it seems that he didn't write Chihiro's route.
I really really hope it does well, it would be a real shame if it flops. I'm kind of skeptical about it, though. The thing I'm looking forward to is the reactions from the "steam people". Some of them won't expect this.