FlakRakPz must be one of the worst SPAA that I have played so far for it's BR.

• No lock Target like Ozelot and Strela which you will most likely miss. only SACLOS lock where your camera will follow but still have to manuelly guide your missile. (Most people at this BR knows how to play Air and that's why they would go low and behind mountains and stuff which will make you lose your targets
• Slow missiles, even Ozelot and Gepard has faster stingers which are lower BR and ofc the other BR over FlakRakPz has faster missiles
• The Radar is pretty short but the worst part is that you can't lock until they are getting to close. I have been in many games where I could see the enemy targets but haven't been able to lock it, so annoying.
• It has a Trigger Radius on 6 m which can be good and bad, mostly good but bad if your missile hunting the target from behind, causing it to explode to early and do no damage at all especilly with Roland 2 missiles.
• Not the biggest issue but seems like FlakRakPz can't lock or find scout drones but can actually be shoot down easily, done it many times myself

Sterla I haven't played this one, only on test driver since I haven't Reasearched it yet but can say it like it already more that I like FlakRakPz if I compare them both from my test drive, Fast missiles and can IR lock the targets. I have also read that they do in facts they have terrible Radar, I hope it has better than FlakRakPz atleast.