Everything the show did well:
-Extremely likeable team and sidecast.
-Besides the main antagonist and kinda Yodonna, the villains in this show are consistently really great.
-The monsters of the week are really entertaining.
-Cool stylish fights on ground and decent mecha fights.
-The team tends to find pretty creative solutions to most problems.
-It feels like the show got the most use out of the team's powers.
-The rivalry between Juuru and Garza is well done.
-Great soundtrack that sounds pretty different from other tokus.
-The dynamic of the team having to balance being heroes and their professional life is really well done.
-Show gets the core of what Sentai is right, where the biggest obstacles should be resolved by learning how to be proper team.
-The progression of the team relationship feels natural.
-The focus of the team feels pretty balanced. The red ranger Juuru definitely has a bit more focus than the rest and blue a bit less than the rest, but for the most part every member, including the extra sixth ranger, gets proper development and no member feels like it was super shafted.
-The show manages to be pretty funny while having proper stakes.
-Slightly better acting than usual sentai.

Everything the show did bad:
-The show is a 'safe' Sentai show if that make sense. It doesn't do anything THAT unique, but it does enough as to not feel generic.
-Main antagonist, while it has an interesting backstory, feels properly powerful/menacing and has a cool final fight, ends up feeling kind of boring overall and gets heavily overshadowed by Garza.
-Yodonna while overall likeable feels very one-note.
-The vehicle partners of the team besides Fire are just kind of all right and not all that interesting.
-The Gekiranger crossover two-parter special is just kind of allright.
-Red Ranger Juuru's catchphrase can be kind of annoying at first but it gets dialed down pretty quickly luckily.

Reasons for the show strenghts:
Due to Sentai having continuous lacking sales since Ninninger, old promoted producers that aren't actually supposed to be producing these shows decided to step in to help. This resulted in Tsukuda producing Kiramager and Shirakura producing Zenkaiger and Donbrothers. Tsukuda wanted to make a 'safe' Sentai show, however unlike the producer duo in Ryusoulger, Tsukuda has a proper understanding on how to make a show like this. Main writer Naruhisa Arakawa is excellent at writing likeable characters and progressing the characters' powers while also making a concise world-building.

Reasons for the show flaws:
Due to being safe it doesn't come up as a super unique show and keeps it from being a top-tier show. That said it's easily the best 'safe' Sentai show I've seen so far.

Overall:
Would highly recommend this show as someone's first Sentai, as it kinda gives a general idea of the vibes this shows tend to have while also just being a really solid show. It being safe definitely drags it down a bit, but just 'a bit', it's otherwise a really great time. Reminder that if you're going to watch this show to watch the episode 0 before starting. It isn't strictly necessary for the plot but it helps set up the show's setting.