I use an altered Goodreads rating system and NetGalley's recommendation rating.
*I do not give half stars.
★★★★★ I love it.
★★★★☆ I really liked it.
★★★☆☆ I like it but it could have been better.
★★☆☆☆ So-so, it was okay but...
Recommend? Not really.
★☆☆☆☆ Eh... I did not liked it.