Although i know this brand isn't cheap... but i swear by ferplast products...
I've used a ferplast heater in my 60G for at least 16+ years and never had to replace it and still works fine... have another 2 (300W) Ferplast heaters in my 200G for the last 2+ years and no problems... and have another one in my small 10G for the last 3.5+ years no problems...
So i'm going to go out on a limb and say this is the best heater out there... since i've tried other US / European brands of heaters and they have all died on me within a matter of a year or two...
Now i'm testing out one of the small 50W Fulval heaters in my paludarium which has been running for only about 3 weeks... so can't comment on how well they work yet...
And in Hong Kong, all the shops that sell heaters claim that this brand of heater is the best on the market... as they've said they seen customers return all brands of heaters which have exploded or i guess cracked in the past, but never seen a fesplast one explode or crack...