The general view on PCT with hormonal products is yes. But back in the day that stuff didn't exist and Arnold was running 26 week cycles of Deca, D-Bol, and more. People relied on their bodies to recover on their own. So it's up to you on how suppressed you think you are but better safe than sorry IMO.
Yes they're worth it depending on what you're looking for and what PH's you use. There is a lot of crap out there. CEL has a great reputation especially on this forum. It's the only company I prefer to use.