At the risk of sounding like I've something to gain from plugging this receiver - I'll go ahead anyway.
Got this out of the box yesterday, plugged it in, and even with my tinfoil antenna I made previously, signals all over the shop, clean and stable. The band the SAW filter allows through is packed full of satellites, clean, clear and no other noise interfering with reception.
I've never seen this kind of stability with my other SDRs, and I've a HackRF and several other of the dongles. There is no drift I can detect at all - beyond Doppler.
This thing picks up even the faintest signal, and it's clear as a bell. Inmarsats and any other sats in this band, even indoors I'm getting STD-C messages decoding perfectly. I'm shocked that a receiver this sensitive and stable is this price ($15). If it performs 1/10000th as well on other bands, then it'd easily overtake all of my SDRs hands down - I haven't yet used the bypass, but frankly I'm going to keep this one as my L band receiver.
A beautiful receiver, clean, sensitive, and a stupidly low price. My suggestion is to grab one before they're gone. If you thought any of the other SDRs were sensitive - plug in the Outernet SDRx and prepare to look at your old SDR with disdain.