EasyTune6/Smart6?

I understand this thread/topic might be better placed in the Gigabyte section of overclocking, but I'm basically just looking for a quick answer/poll.

For the most part it seems from the solid, informative posts on this fine forum that using EasyTune6 and/or Smart6 for a simple +20% overclock (on an i5-750 for instance ---> 2.67ghz to 3.2ghz) is frowned upon and not recommended. It is not recommended for the good reason that EasyTune6 and/or Smart6 are not reliable and can become a major pain.

Basically, I'm just looking for confirmation of the above conclusion/opinion. Though if there are EasyTune6/Smart6 users here who have used the Gigabyte software to obtain stable +20% overclocks, please let me know.