Gameplay:
While the game itself is great, it gets old relatively quickly.
The main mission types get stale after about 100 hours in (probably earlier for someone who's not used to grindy stuff), they mostly consist of mowing down enemies and mowing down enemies while defending a point.
There's spy missions which consist of going into heavily guarded(with traps and the kinds) areas and stealing information, but there's characters that make it completely trivial.
The open areas do help with monotony, however having daily caps on the standing(essentially the reputation you get with the in game factions, which unlocks gear, cosmetics and pretty much everything else you'd want to get) makes it so you don't feel like playing often.

Pricing model:
Prime vaults are annoying, locking the primed(better, the only ones worth investing formas into) version of weapons and characters behind timed events is just bad.
Everything is insanely overpriced, they'll randomly give you a 75% discount(which expires after 2 days, making you fear missing it out) on a single MTX, without that -75% the prices are disgusting.
To buy the current primed warframe + 2 primed weapons it costs 72€.
The 75% discount doesn't apply on that mind you, you either pay 72€ or grind extremely boring missions for it in game(which even then, you have to grind for parts that are RNG).

Overall, i don't think it's worth it to get invested in this game, even if i did have fun with it for a while.

Gameplay: While the game itself is great, it gets old relatively quickly. The main mission types get stale after about 100 hours in (probably earlier for someone who's not used to grindy stuff), they mostly consist of mowing down enemies and mowing down enemies while defending a point. There's spy missions which consist of going into heavily guarded(with traps and the kinds) areas and stealing information, but there's characters that make it completely trivial. The open areas do help with monotony, however having daily caps on the standing(essentially the reputation you get with the in game factions, which unlocks gear, cosmetics and pretty much everything else you'd want to get) makes it so you don't feel like playing often. Pricing model: Prime vaults are annoying, locking the primed(better, the only ones worth investing formas into) version of weapons and characters behind timed events is just bad. Everything is insanely overpriced, they'll randomly give you a 75% discount(which expires after 2 days, making you fear missing it out) on a single MTX, without that -75% the prices are disgusting. To buy the current primed warframe + 2 primed weapons it costs 72€. The 75% discount doesn't apply on that mind you, you either pay 72€ or grind extremely boring missions for it in game(which even then, you have to grind for parts that are RNG). Overall, i don't think it's worth it to get invested in this game, even if i did have fun with it for a while.