I had an earlier version of this (1.4) to which I had put the jumpers in wrong place and current sensors and had burnt it. I had thought the whole setup had burnt.
So bought a 1.5 version of CEOSD recently and tested the old version of CEOSD with the new current sensors. To my surprise everything worked  properly.
I went back to my old CEOSD current sensors and saw a small copper lining had burnt (probably this was a protection ckt) bypassing the circuit towards the actual osd. Today I completed the circuit with a small soldering and everything worked fine.
I have no interest in version 1.5 as there is very less functionality added in this as compared to v1.4

For sale is the new CEOSD which I bought a week back and is just tested once.
Expected price Rs5500 with shipping anywhere in India.

For more information regarding CEOSD 1.5 http://www.foxtechfpv.com/foxtech-ce-osd-v15%EF%BC%88new-interface-metric-and-imperial-%EF%BC%89-p-170.html
It comes with 1. ceosd ckt 2. current sensors 3. gps  and connectors.

What are the features which are missing which is there in 1.4 version?

1.5 has all features which is present in 1.4
Only thing 1.4 is missing is the dual screen selection
if you check in and scroll down http://www.foxtechfpv.com/foxtech-ce-osd-v15%EF%BC%88new-interface-metric-and-imperial-%EF%BC%89-p-170.html
there are two displays that can be selected in 1.5.
1.4 version has only one (the left one is enabled).

Is the Firmware upgradeable ? if the hardware is same...

I dont think it has any interface for software upgrade. Also 1.4 and 1.5 chip is different.

Booked for gusty sir