I flash to Juwe's Smart Edition v4.3.1 based on XWJVH yesterday from Darky Extreme V9.5 froyo. After using it for 1 day, here are the few things I discover....
+It feel faster and smoother than Darky V9.5
-1. Its till did not fix my GPS loack issue. I can't get a lock at all with Papago.
2. no more chinese support
3. poor battery life. I am working offshore right now and there is no phone signal here so I have been putting my phone on Airplane mode the past 2 days when I am still on froyo. While on stand by for almost 2 days, the froyo hardly use up any power (only 3% for 2 days). But I was on Juwe GB, I went to bed last night at 10.30pm with 45% bat left and work up at 7.00am with only 32% left. Check my battery usage and cell standby use 78% of the bat!!!

4. I am using Extended widget where I set my shortcuts for 3G/2G, Wifi, Bluetooth, GPS etc as shown by the picture below...

Previously on Darky V9.5, I can directly toggle on/off for wifi, GPS, Data except for 2G/3G where it will bring out the Mobile network setting page. But in GB, when I press the Data widget, it won't toggle data on/off anymore but instead it bring out Mobile Network Setting page like shwon below...

This is the same for GPS. Previously the GPS widget would just toggle GPS on/off but now in GB it cannot do that anymore but instead it open up this page...

5. Phone crash once last night....
Now I am very disappoint after going thru all the troubles to update but only to get things worst off.
I think I pretty much understand the SGS phone running Android now. And I can summarize it in one sentence....
"It let you do a lot More, but you actually achieve Less"