Unfortunately my DSTL1's touch screen stopped working 1 month after warranty expiration. So the phone is unusable :-(. I got a Gigabyte GSmart S1205 to replace it. It has WM 6.5 which is a really bad OS compared to Android. I wouldn't suggest you to get it.
The DSTL1 has some drawbacks like missing GPS, low RAM and mainly old Android version (1.6). Some developers are trying to port 2.1 to it, but it isn't done yet a nobody can promise that it will ever be finished. Unfortunately the DSTL1 is still the only dual SIM (2x GSM) Android smartphone on the market.
A new model from the same developer (Yuhua) should be available soon. It has some good specifications (GPS, 3G, capacitive touchscreen), but it is quite a big 4.3" clamshell MID.
So the situation hasn't improved much during last 4 months. There are some HTC clones which claim to support WM 6.5, Android and dual sim. But AFAIK
the dual-sim functionality is not supported in Android ROM. I also heard about a phone from India - Lemon P1. But I haven't seen it selling anywhere. So the DSTL1 is still the only choice....