Just to share my experience using Taobao Global Consolidate Shipping. Few months ago, I purchased a total of 8 items amounting RM 309 (item cost + shipping). To summarize:
1. Total cost = RM309. 8 items worth = RM 164, Shipping = RM 145. Total weight = 9.31 KG
2. The good thing was the shipping was fast for me (ABX shipping). From China to warehouse, from warehouse to Malaysia took about a week plus to arrive. Definitely faster than my aliexpress and ebay experiences (they took 2 weeks to months to arrive).
3. Consolidate shipping means they consolidate the items and calculate each of their weights/ volumetric weights. I had 8 items and totaled up to 9.31kg. I initially thought they would group all the items together, repackage it and then remeasure the weight/ volumetric weight, but that's not correct. When I received the item, it was repackaged inside a big gunny sack about 1Meter square in size (1mx1mx1m). So, they actually tape the goods together and just chuck inside the bag for "consolidate shipping". Good thing is I didn't have any fragile items.
4. The items which cost the most was the 5 meter vacuum cleaner hose. The item cost only RM 21.68, but the shipping cost itself is RM 96.72 because of the volumetric weight calculation - 6.21kg (actual weight was about 2-3KG).

But, I figured that the price in Malaysia would have been cost much more since Karcher is already charging me RM 100 for 1 meter hose, so I decided to go with the purchase anyway.
5. For me, the only frustration is the weight/ volumetric weight because the sellers do not display them. You have to contact seller to confirm on it. And they can only converse in Mandarin. So I did chat with one of them since I know a little bit of mandarin. But I still relied a lot of Google Translate.
6. Wouldn't say it is a bad experience because if I bought these items Malaysia, it would have cost so much more! Though, I have never used any agent (EZbuy, yes logistics) before and wanted to try getting directly from Taobao itself. But I do intend to use agent in my next taobao purchases. Hopefully some can share which of the services offers the best in terms of shipping rate, etc.

What was the TGDS shipping quotation? Was it cheaper or more expensive than Dex consolidate?