Lagshot or GForce as a swing trainer

[BigGuy]

Hi, I tried the GForce swing trainer 7 iron, while I was having a lesson. I liked the ability to teach the right tempo and how to swing without arms effort.  I was curious to see which one of the two I should buy. Anybody, compared them. Any specific difference between them. Thank you all.

[G0al3d]

I like my Lagshot a lot, it's hard to get the hang of at first but REALLY helps with tempo, it's also really good for warming up before a round. I don't have any experience with the GForce