10 months of prep and still at 500 with Quant as the main drag. I know this exact feeling and I'll give you my honest take, not the marketing version.
TTP is genuinely better than E-GMAT for GMAT Focus Quant, in my opinion. Here's why it worked for me: TTP builds from pure fundamentals and forces you to understand *why* each concept works before you move on. It's granular. If you're struggling at the basics, that structure matters a lot. E-GMAT has improved over the years, but their Quant section feels more like a course designed to cover topics than one designed to build genuine problem-solving instincts.
The "735+ in 2 months" claims are usually outliers, not the norm. People who pull those results almost always had prior Quant exposure (engineering, finance) and were already above 600 going in. For someone at 500 targeting 720+, I'd plan for 4-5 months, not 2-3.
A few things I'd add given your specific situation:
First, 10 months of prep suggests you might be practicing problems without fixing the underlying knowledge gaps. More practice isn't the answer if the foundation is shaky. TTP's chapter system forces you to identify exactly which topics are broken.
Second, for the GMAT Focus Edition specifically, the Quant section rewards speed and pattern recognition. TTP's volume of practice problems is a genuine advantage here.
Third, if TTP's price is a real constraint, do the free trial for a week and see if the teaching style clicks with you. The style matters more than the brand.
You're not far from 720. The jump from 500 to 650+ is mostly about fixing knowledge gaps. From 650 to 720, it's about execution under time pressure. TTP addresses both.