You'll get a large amount of opinion on this topic.
For my part, I have had extensive experience with the more common ones: Finnex (Planted Plus) and Fluval 3.0 LED.
The Fluval 3.0 LED has been stellar plant grower. It is also the easiest light I've ever used. It was connected to my iPhone and up and running with a light cycle I configured all within minutes. It allows powerful customization of timing and color that is very easy to manipulate through their app. I'm sure there are more specialized lights that are either better for growing or have more customization capabilities, but those will almost certainly trade off ease of use, price etc... I think Fluval hit the perfect combo of easy to use, good customization, and solid growth characteristics, particularly for people who don't want to spend too much time thinking about lighting. Some people like extreme optimization, engineering and customization of their lighting and that is perfectly fine. That type of buyer might not like this light.
The one downside of the Fluval 3.0 is it needs to resynch with the app on a power outage or it goes back to a default automatic mode and may have the wrong time (e.g. if a long power outage). You can save your configurations so you don't have to reconfigure your light cycle but you have to reset the light to your custom cycle from the default cycle it goes to when power is dropped. I put mine on a small battery backup (along with a filter to keep going in power outage) to mitigate this issue. If you live in a place with frequent power blips, that is something to consider. One last AWESOME feature of the Fluval 3.0 is they are waterproof. No matter how careful you are, you end up getting water on the light at some point. Its nice peace of mind.
I've had four Finnex's. Their remote control is awful in comparison to the Fluval and probably anything else out there (unless they upgraded that with recent models). It's a cheap IR remote that doesn't work half the time. I understand their newest products are more customizable now and may be similar in capability to Fluval. The Planted Plus lights I have were only customizable if you did not use their 24/7 feature and used you own timer. Unless they upgraded recently, the lights I had were not water tight and in fact I lost one light due to mold and algae growing in it, after just one year using it. It was due to a bubbler spray but still, expected an aquarium light to be a little more resilient.