The EHpro version is pretty good. You never did say what kind of atomizer you got for it. Is it a dripper or
tank? Just in case you don't know, let me go over a few basics on Eecigs. These are generalized basics.. there's almost always an exception, but these are "for the most part".
Atomizers:
There are many types of atomizers out on the market. most fall under one of these categories: Cartomizers, Tanks, and Drippers.
Cartomizers.. typically found on cigalikes (Blu, Njoy, etc). Small, and usually prefilled with juice. People found a way to wrap a tank around a cartomizer to make what's called a "carto tank". Prefilled cartomizers are usually on the more expensive side, since most are disposable.
Tanks... This is where the majority of a "true" ecig start. most are somewhere between 22mm-25mm, but there are some that fit on an Ego battery that are smaller. Tanks come in clearomizers, Rebuildable and non rebuildable. Clearomizers are halfway between a cartomizer and a full tank, but they allow you to refill the tank. Rebuildables let you put your own wick and coil in to suit your taste. The most popular is just a tank.. many know as a "subohm tank". These have a tank that can be refilled, and the atomizer and wick are replaced when worn out.
Drippers... These are atomizers without a tank. The user has to constantly drip juice on the coils to keep them wet, and rebuild the coils and replace the wicks themselves. These are usually the most customizable and most durable.
MODS
There are two types of mods.. Mechanicals and Regulated.
Mechanicals are just a basic tube, and are essentially a straight connection to the atomizer. Out of the two types of mechanicals, there are hybrid and non hybrid mechanicals. Hybrid mechanicals connect the center pin of the atomizer straight to the battery. These can be dangerous, since the center pin of the atomizer HAS to protrude from the atomizer, otherwise you will short the battery. Non hybrid mechanicals (which is what you have) has a pin, and can adjust for battery height. The benifits of mechanicals are they are very durable. The downside is that they have no sort of protection from errors or mistakes.
Regulated. These are mods that adjust the power from the battery. Most mods allow the user to set how much voltage or wattage is used, These are typically the safest mods on the market, since having electronics between the battery and the atomizer leaves little room for error or mistakes. If your atomizer has a short, the regulated devices will not fire or warn you.
Some suggestions and advice:
Mechanicals, IMO, are more for hobbyists who want a durable mod that is very customizable. they control the vape by the coil, and require knowlege of coils, atomizers, and ohms law. They're not advised for beginners unless they are willing to do some learning.
Vape quality is usually good at first, but will diminish as the battery gets drained. It's up to the user to decide to change the battery, otherwise you can charge it too low and ruin the battery.
Keep your mod locked at all times... get used to the routine.. vape..lock. Lock the mod at all times, even if you're putting it down for a second. I was driving with my Caravella, and decided to lay it down on the side for a few minutes thinking that is enough to keep it safe. It leaned and pushed down on the fire button without me knowing.. I went to pick up the mod, and it almost burned my hand.. it was firing for about 4 minutes straight. I had to throw away that battery since it got so hot, it melted the plastic wrap around the battery.... always lock it.
If you can, get magnets for your mod. They don't wear down like springs do. I haven't gotten magnets for my Caravela mod yet, but I have some for my other mechanical (nemesis), and I like the overall springiness of the nemesis. I still like the design of the Caravela better though.
Get a good ohm reader that reads down to the hundreth's The Smok meter sold at Madvapes only reads down to the 10'ths.
The derringer dripper looks great on the Caravela and provides exellent flavor.
If you can, I recommend getting a kepler heat sink... it is a heat sink that goes between the atomizer and the mod. It will help with the heat getting down to the battery. I also use it to keep any juice from seeping into the 510 of my mods.
Clean your mechanical mod often... Mechanicals work on a direct connection, so about once a week, make sure all contacts are clean and shiny.
....did I mention...always lock your mechanical mod?
Anyways, enough typing... I am getting ready for work, and then for a weekend trip, so I'll check this thread in a few days. good luck, and happy vaping.

(yes, my Caravela will be coming with me)