No, I don't agree with the review on the 301. The throat space is decent and because it is internally belted it's very powerful. Lightweight is a plus for the machine and it doesn't hurt the ability to FMQ. If you google you can find answers to all your questions on throat space. It's out there if you look. I have FMQ countless quilts on my 301 and the stitch quality is wonderful and I have received many compliments on the quilting.
Many purists cringe at the term "harp" space and say harp space is for harps only. So, I stick to throat space as to not ruffle any feathers:>