Data recovery tool kit for Seagate HDDs

Hello everybody,
I would like to ask community sugestions about a data recovery tool I would like to buy for Seagate HDDs. Until now I used a Nokia TTL cable which helped me repair a decent number of Barracuda 7200.11 drives. However this cable can't offer any help on LP, ES.2 or DM003 series HDDs which I get very often for data recovery and obviously have some firmware issue. Tools like PC3000 are too expensive so I was about to give up on these cases but then I found a tool kit called DfS on Amazon

https://www.amazon.co.uk/Recovery-software-CS-Labs-FileChecker/dp/B01FW23R9Q/

This set claims that can recover all Seagate drives with firmware issue and also do diagnostics while it costs less than 70£, about what I get paid for a single data recovery service (I am not pro but I have helped some people last years so their friends come to me often).

I am asking if anyone has used these tools and if they are such bargain as it seems. Do they reply to questions? Is the software easy to use or is it Google translation like Salvation Data tools I once used? I am not worried about loosing 70£ but about causing permanent damage on a drive.

Finally if anyone knows of a similar tool I would love to see a link

Any sugestions welcome