After using it for a day, I like the Sigelei V8 mod and my wife likes it even better. She has abandoned her Vamo 5 in favor of the V8 using it at 4.2 volts with a 24mg liquid using a Protank 3. Typically she used the Vamo 5 with same nicotine strength liquid at 9 watts. The build quality seems solid.
On the down side, it only has 510 threading and changing batteries is somewhat cumbersome. I have ordered a 510 to ego adapter to allow use of our ego threaded tanks. The Lord Davons video pointed out that the positive battery connection is slightly recessed which is a problem for flat top batteries. It seems that a blob of solder on the V8 positive connection (not on the battery) will overcome that issue.
However I do not like the other items in the kit. The included battery charger can only charge one battery, which is rather foolish given that V8 uses 2 batteries. It isn't a problem for me as I have a Nitecore dual charger.
Also I do not like included DCT cartomizer as it is more difficult to fill compared to most any clearomizer.
I give the mod 4 out of 5 stars, but give the starter kit as whole only 2 stars as I think it would cause first time users to give up vaping.
I hope that helps.