Only you can decide if it's worth it to you.
If you are not a high wattage vaper, then no, it's not a good fit for you. If the tanks you use don't have REALLY OPEN airflow control, then no, it's not a good fit for you. I tried my Protanks w/ v2 airflow base (single coils) on my 20watt iStick and they didn't work very well. So back on the MVP they went.
The iStick 20watt ran very hot. It is was not capable of down regulating power (it widely inaccurate, especially at lower voltages). I don't know if this problem has been fixed on not. In the end, it won't matter to many vapers buying this devise as they will not be running their tanks at lower wattage/voltage.
Features and Specs:
510 Threaded
Variable Wattage (VW) and Variable Voltage (VV) mode
Maximum Output Wattage: 30 Watts
Dimensions: 3-1/8" x 1-5/16" x 13/16"
Adjustable Voltage: the voltage is adjustable from 2.0V to 8.0V
Adjustable Wattage: the wattage is adjustable from 5W to 30W
Minimum Resistance: from 0.4 ohm
Built-in battery: Capacity 2200 mAh - to last all day long
Incremental OLED screen: battery condition, atomizer resistance, wattage and voltage
Battery Protections: atomizer short circuit protection, over 10 second protection and low voltage protection (battery lower than 3.3V)
Micro USB rechargeable: supports charging with a 1Amp wall adaptor which is faster