Love mine! I have four of them. Yes, they tend to get hot and I vape at a very low wattage, around 60-65. I prefer a cooler vape and anything past 65 is way too hot for me to handle.
If you are having issues with less flavor but you are getting decent vapor production, I suggest you close the air flow a bit. It might lessen the vapor production but it really helps with the flavor issue. A lot of this is also dependent on the VG of your juice and the coil. I like both the octo and quad, but I prefer the quad a bit better with lesser VG juices. I've found if you are using a higher or max VG, the octo is ideal if you turn up the wattage.
There is one problem I've encountered with the octo, it tends to burn out on one coil and I get that dreaded dry hit taste. This happened the other day and when I took out the coil I noticed that only one of the top coils was black and the others were normal color and it ruins the whole coil. However, that is the only shortcoming I've had.
I know the coils for these bad boys are expensive, however, the price seems to be dropping a bit from when they first came out. I buy mine on Ebay and get a pack of 3 for $11.99. They are authentic, I made sure of that the first time I bought from the vendor.