Despite all the bad-mouthing here and the low reviews at Amazon, I have this one currently sitting almost invisibly on my window sill 4 feet off the ground and I get every station within 50 miles including those with the better 4K transmission provided over the air.
This is actually my second indoor antenna of this type being used on two separate tvs (price is reasonable). I'm a retired communication engineer and understand not only the technology but also the practical concerns about using an indoor antenna (or any OTA antenna).
Typically, of first concern is elevation or height in the air -- the higher the better. Both of my antennas perform well and get the same stations despite one being 4 feet up and the other about 16 feet up. In my previous home, I had the first indoor one about 30 feet up and it performed inside (mounted near my 3rd floor ceiling) as well as the 8-bay HD antenna that was mounted outside at about 50 feet.
Second, almost all tv antennas today actually perform better if pointed at the main source of transmission. I can get Raleigh to the east, but not Greensboro to the west (unless I turn the antenna). Keep in mind that broadcast power from the station is a key factor of reception.
Be aware of what is around you. My former home was in an old forest with 80-90 foot trees on all sides. Those trees caused a lot of issues to my all important east side. A motorized rotor to turn the antenna will help, but most people don't bother since digital broadcasts became the norm. In my current home, I tried the antenna at 16 feet up in my living room, but that turned out be be behind the metal flashing around my chimney which almost completely blocked and interfered with the signal.
With only NC PBS antennas a few miles to the west and most others in an antenna farm in Raleigh, I get 63 channels (many redundancies like ION from smaller local stations).
From my perspective, try one -- at $25 or less it's not big loss and it's light enough to try manipulating first for best reception before mounting. Note that similar antennas are sold with only a 6-8 foot cable. A long cable length can be very helpful with no extra cost.