Thanks everyone for the positive encouragement on my decision. Honestly, it wasn't well thought out, I just saw good reviews, a 510 style seemed to be what I need, and the Riva 510 got good reviews and was really affordable. I hope I like it.
I have to say I was really ...... off last night about my XHale o2 atty failing. Then, some how I can't find one of my batteries. The atty that failed is less than a week old. The atty is definitely the weak link in this as well. Having only one, mine needed to be cleaned again since last night. I am a mechanical person and this thing isn't inconsistent to the point I thought. It is poorly designed. For me, I can take that as a lesson as it taught me how these things work. I feel bad for the average person who would just give up on this.
With the XHale o2, I first thought the battery was the problem as it would hit much harder after a charge, at first. It was just that the atty got fluid on it. Then as time when on, I thought it was the carts because after a charge, it wouldn't hit right but putting a new one on may or may not help. It is really just the atty, it works great after cleaning every time.
I think you could enjoy this if you knew the issues and didn't mind cleaning it all the time. That is not good for a 2 pack a day smoker trying to transition. Another reason I decided to not go with a really slim design, they are not what I need, even if I like the idea better.
I hope my Riva 510 is like a good tool, you may have to clean it but it is reliable. Then I my recommend my GF a Joye 510 and have the ability to test things and let her know what to buy. She didn't last more than a day with an e cig (XHale 02 as well) because of issues. Hopefully I love mine and she does too and gets into it. In the mean time, I will clean her atty consistently and give her my XHale o2 as well. She actually wants to quit smoking, I just wanted to give it a shot and it's helping me a bunch to cut down without even making much of an effort.