From a thread on Rebreatherworld forum:

Great customer service Liquivision (June 2, 2010)

While diving on Innerspace at Cobalt Coast my X1 (still under warranty) went completely black on me. […] Back at home, I’ve sent an email and within two hours I had a response.
Emilie Hiob send me a diagnostic software, which I used for check up of my X1. I send the results back and went to sleep. The same night Liquivision send me response saying that […] the replacement unit is ready for shipment, as soon as I provide them with the address where I want me new X1 to arrive. In the process, I got a free upgrade for the newest hardware version - my original unit was older version with only single depth sensor.
As much as I was not happy about initial failure, everything after was a very pleasant experience greatly due to Ms Hiob. THX, Emilie!
rgrds
Tomek (RZEP17)

Re: Great customer service Liquivision  (June 2, 2010) 

Their customer service kicks ass, no doubt.
[…]
Tony (Tienuts)

Re: Great customer service Liquivision (June 3, 2010)

yes really good customer service!!!!

Had a crack in the glass, and four days after i contacted Liquivision, the new x1 arrived in Austria (anton610)

Re: Great customer service Liquivision (December 1, 2010) 

I can only confirm that their support rocks!
I had also a flash chip failure after two years, Emilie was very responsive and a new unit is already under way! GREAT

And I have ordered a second unit as back up!(teddy 2005)