I've had my VPG for 2 seasons now. Overall, I think it's great.
The only interference problems I seem to have is from Lowrance units nearby. I often fish with buddies that use 2 or 3 Marcum flashers with no problem.
One good thing about Aqua-vu:
Last year when they mailed out a card about a free software upgrade, I called and told them mine seemed to steam up inside the display head when I brought it in from the cold. She said "Oh, sounds like a case seal issue..We'll just replace it."
I had to pay shipping to them, about $8, but within a week, I had a brand new, upgraded display head.
I'd recommend this unit to anyone, and have.