I've purchased many mods over the last year or so.

And since you asked what we think is good, I'll tell you where I'm at today (but do read Don's guide... LOL).
Once I went with a VV mod (Variable Voltage) I can't go back to a 3.7v. I've never been one for 6v (really, not much over 5v) since I have to have good consistent flavor and never have been able to get that from anything over 5v.
I also prefer special settings depending on the type of atomizer (and its resistance/ohms) that I'm using. Some are best at 4.2v, some at 4.6v and some at 5v. A variable voltage mod is the only thing that works in this case. I get consistent flavor, great billowing vapor and my atomizers run great. Oh, and no .... switch (Like Don, I don't like those either).
There are several VV mods available and I've bought two models of them. The Darwin wins hands down since I'm able to read exactly what my voltage/amps/ohms/watts/battery charge available are as I'm vaping and I'm not playing with a bunch of batteries anymore (this plugs in with a USB to charge).
If my atomizer ohms change, the Darwin microprocessor will maintain the set watts (heat) level regardless of changes in the atomizer ohms (which all atomizers will have a drop off change as they are used for a while). The Darwin constantly reads the atomizer Ohms and makes constant changes (automatically) to provide a consistent heat level. As far as I know, this is the
only mod that does this.
If you don't know spit about ohms and amps... it doesn't matter. Set the wheel to read the Watts/Voltage you want (which reads out on a LED screen) and vape away, adjusting the easy to use thumb wheel up or down as you feel you need in order to find your sweet spot.
This unit can be set anywhere from 3.7 thru 12.9 volts and when I have an atomizer that I'm not sure if it is dead or not, the unit tells me (number swings up to 12.9v and reads out at 0 ohms). No multiple button presses to run through a menu of choices (as with some), no tiny screwdrivers or multimeters to figure out what voltage you're vaping at, no rocket science knowledge needed to run it.
It also shuts off when you swing down the atomizer arm so I'm not dealing with a mod atty heating up in my purse or pocket because a button is being pressed accidentally

. (nothing more fun than explaining to a store clerk why your purse is on fire). Having it fold to a compact rectangle is pretty great and if I drop it, I'm much less likely to damage my atomizer and the fitting if it is folded up. It came with a great snap on belt holster for it as well.
I thought the shape would be weird, but after using it for just the first day, a tube shape mod now feels odd and bulky. The lithium polymer (similar to a cell phone) battery runs about 14-15 hours for me (and I vape constantly). You can also use the mini USB as a passthrough while it is charging and I can charge and vape on the go in my car with just the car usb power adapter with no worries.
The Darwin also has a 2 year warranty (one year on the battery).
You can find out more about the Darwin in these threads:
http://www.e-cigarette-forum.com/forum/nhaler/151096-darwin-evolv.html
and this thread review with lots of pics and comparisons
http://www.e-cigarette-forum.com/fo...ressions-newest-pre-production-prototype.html
At $229 it seems pricey, but when I compare that I have replaced almost every mod I've ever bought within 6 months (or less) and add the price of four to 8 sets of Li-Ion batteries for each mod (actually, I probably have 40-50 batteries of various sizes here) and several chargers since I always have a pile to recharge... The Darwin is actually is quite affordable.
Happy new Toy Hunting!
