So you believe it's worth it?

For the convenience factor alone, yeah.

You can swap out the internal drive for any size you want now. Not sure if I'll do that or just plug an external one in (easier for copying things across).

I wonder if XBMC has been ported...

Can you even remove the drive from the external caddy thing? I have an original shape model.

Yeah, you need torx 10 and 6 to get into it, and it's just a standard 2.5" drive inside. If it's a full height drive (12.5 mm?) you're putting in then you need to bend off 4 retaining clips, but no biggy.

I have a phat one. The slim ones can only take 9.5mm high drives from what I've seen.

And does yours now have a chip of some sort?

Yeah, not sure exactly what chip but I'll probably open it up at some point to inspect the guys handy work anyway.

Think it's one of these : http://www.consolewizard.co.uk/kes/original-phat-xbox-360-jtag-rgh-flashing/53-xbox-360-phat-rgh-reset-glitch-hack.html