Question about Ubiquiti AirCube

hello. i'm looking for an access point that also serves as a switch. this cube is ideal for that, isn't it? I have now read in the reviews that the speed is limited? I have fibre 990 up and 990 down according to speedtest.net. if i connect this cube in between, the speed should not suffer much, right? theoretically, every lan out port can also do 1gbit according to the specs. it's just important to me that my desktop, which now gets 990 990, doesn't have significantly less because of the aircube. can anyone confirm this from their experience? Thank you!