Then of course theres the whole... iAtty 2 (because I can't spell the official name off the top of my head) and waiting to get that... ugh!
If you are not someone who has to swap flavors every few minutes, the Odysseus is just awesome!!! It's all I've been using since I received it a week ago Tue.
Regarding your ssggts... There are really only two important things to remember: Keep your contact points clean (including your button spring and the bottom post spring) and DO NOT over-tighten the telescope. I had all kinds of problems with my ssggts when I first received it... But all those problems were user-error related, caused by me tightening the telescope too much, even though I didn't think I was. I was using Resurrector cartos in a tank at that time and didn't realize how easily the center post on those cartos gets pushed up resulting in shorting the carto. Since I stopped using them I haven't experienced those problems at all in months. You shouldn't have those kinds of problems with IO6s as easily.
I think you will really enjoy the airflow control. It's something that doesn't seem like a big deal when you just hear about it but once you try it, you realize that it changes the characteristics of your vape quite a bit.
GGTS is a very "complex" device that's very simple to use and I think you will enjoy it a lot! Let us know if you ever have any questions. There are some great people on this subforum who are always willing to jump in and help out.