I found this product while e-shopping for my Sister's birthday; like many she still has a job and in this stressful time of recession what could beat the gift of Tranquility! Benefits listed for this device pretty much blew me away. I went on to contact Adrenaline Guru [AG] by phone to speak with a member of their staff, who was both knowledgeable and helpful.
From ordering with AG and experiencing the Bliss in action:
It worked great in my Sister's flat (being home to 2 smokers). The air gradually became fresh like on a nice morning or evening - though curious about the new addition to their living room, her cats didnt try to play with it and after a brief sniff ignored the Bliss.
The essential oil aroma is instant - nicer than burner type diffusers and no irritating smoke like incense sticks. By contacting AG you can choose which free oil - Ylang-ylang smells gorgeous! Also she loves the pink colour, which matches her ipod, exercise bike, digital camera, mobile phone... need i continue? xD
We had the Bliss going for around 4 hours, it was still misting away and producing aroma. As for maintenance, small ceramic discs help create the ultrasonic diffusion. Widely available, they may need replacing after... 60,000 hours!
Overall my opinion is the Bliss diffuser rocks - simple yet very effective! Out of the retailers I found, AG offered the best deal including delivery plus the choice of a free oil. I will definately order from them in future, starting with another diffuser for myself!