I have both. I ordered one pro products panel ($90), then I saw LLL was trying to clearance out some of their meduim helix panels for $55/each. I couldn't pass up that deal, so I ordered the three more I needed.
My only complaint about the helix panel is that they use FRP (fiberglass reinforced plastic) on the bottom of the panel and you have to let this offgas. This will take approximately an entire week at full power outside of your cage. This really annoyed me, because I had mounted them and they wouldnt stop smelling so I had to take them and hang them up in the garage from the rafters and plug them in. On for 2 hours, off for 2. Then on overnight. The heating and cooling helps them offgas a LOT faster.
I didn't have to do anything like that with the pro products panel, i'm unsure as of what they use but it's not anything that emits fumes like FRP does.
I haven't ever heard about a pro products as unreliable... mine's only been running about a month and a half now, but it's been keeping my cage at a constant temperature (on a thermostat).
They really both do a perfectly fine job, I think. However, if I had the money I would order a pro products panel because they don't need to offgas, and they affix to your ceiling a lot better than the helix panels do.
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-Chris
The reason mainstream thought is thought of as a stream is because it's so shallow. -George Carlin
A fool doesn't learn. A smart man learns from his mistakes. A wise man learns from the mistakes of others. Which one are you?
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N. American Rat/Corn snake care sheet I wrote
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Current snakes:
0.1 Licorice Stick Black Rat (Lola)
1.0 Black Rat (Frankie)
0.1 Texas Bairdi (Rosa)
0.1 Blue Beauty (Brunhilde)
1.0 Green Tree Python (Monty)