Tweaks to "Features" in README

Author: Shnatsel

README.md

@@ -8,8 +8,8 @@ and safe Rust. It is the fastest pure-Rust FFT library according to our benchmar
 - Takes advantage of latest CPU features up to and including AVX-512, but performs well even without them.
 - Zero `unsafe` code
 - Python bindings (via [PyO3](https://github.com/PyO3/pyo3)).
-- Optional parallelization of some steps to 2 threads (with even more parallelization planned).
-- Did we mention it is really fast?!
+- Simple implementation using a single, general-purpose FFT algorithm and no costly "planning" step
+- Optional parallelization of some steps to 2 threads (with even more planned).
 
 ## Limitations
 
@@ -106,4 +106,4 @@ Finally, run:
 The name, **PHFT**, is derived from the implementation of the
 [Quantum Fourier Transform](https://en.wikipedia.org/wiki/Quantum_Fourier_transform) (QFT). Namely, the
 [quantum circuit implementation of QFT](https://en.wikipedia.org/wiki/Quantum_Fourier_transform#Circuit_implementation)
-consists of the **P**hase gates and **H**adamard gates. Hence, **PH**ast**FT**.
+consists of the **P**hase gates and **H**adamard gates. Hence, **PH**ast**FT**.