Porfolio123 for an individual retail investor has many different pricing levels.
$25/mo, $299/yr Screener with 5 Yrs of point in time backtests for stocks & ETFs.
The 5 years backtest and access to ranking systems makes it better than SIPro but GTR1 with a SIPro subscription is in my opinion better. 5 years is a minimum period for backtesting. Some individuals who have tested future performance of screens have found best performance using either ~historical 10 years or another peak at ~20 years.
$84/mo, $1000/yr Backtest version gives you 10Yr backtest, customizable ranking systems and allows you to select Universes (SP500, SP1500 equivalent, Easy to trade US, Russel 1000,2000,3000 equivalents), use your own derived formulas among factors.
There are also Portfolio $1500yr and Ultimate $2400/yr and still another optional charge for AI computer time.
To me the question becomes how large is your portfolio and how much do you believe their tools will increase your return? If you have a portfolio of $200K and your return is increased by 0.5% that might justify the Backtest version.
Having read many testimonials over the years there are a large number of people who are unable to take advantage of the features and end up losing money. There are also a number of long-term users that continually report very profitable over all returns. 30 to 50% CAGR over 5 years but YT who now works for 123 and has a long series of successful years since 2015 lost a little last year. From my observations those individuals tend to be either from the financial universe or very mathematical inclined individuals and it requires a significant amount of effort.
I first started using P123 in 2005. I now have the Ultimate version with all the AI additions. So far AI predictions look better than any previous screens. But my AI models can’t predict a market in turmoil! I’m currently 95% in cash waiting for some stabilization!