For UHF/VHF (GMRS) I just use the Surecom SW-102 off of Amazon. Gives you SWR, power, and shows the transmitted frequency. For cutting off the shelf whips and the like it works great. I also have a variant of the Nano VNA. It it more finicky to use, but does work and gives you tons of information. I use that when making HF antennas. Not necessary IMO for GMRS stuff. The surecom is easy to use right out of the box. And for the price I think it's worth it. Are there better? Sure, but you'll pay more than you probably paid for your radio... just my 2 cents from my experience.