I was doing some research on these packs after seeing a post on rcm about them and found out that their prices for what you get are acceptionally good.
Take for instance this 4200mah 2s 35c cont saddly pack for $76-
http://rc-mushroom.com/product_info....ducts_id=16250
Compare that to Minamps 4400mah 25c saddly pack for $135...-
http://www.maxamps.com/proddetail.ph...-Saddle&cat=95
And Fullymax's 5100mah 35c 2s saddle pack for $92-
http://rc-mushroom.com/product_info....ducts_id=16252
Compared to Minamps 25c 5500mah pack for $165....-
http://www.maxamps.com/proddetail.ph...-Saddle&cat=95
And take a look at this, A 5000mah 35c 2s HC pack for $86-
http://rc-mushroom.com/product_info....ducts_id=16251
Just thought I'd share this.