Set of 4 Thermo Sudokus I would LOVE testers for

[BlueToast001]

1: far too easy to publish on its own, but a very nice addition to a small puzzle pack like how you're presenting them together here.
2: nice one star difficulty puzzle
3: this one was kinda difficult for me compared to 2 and 4, possibly even a two star puzzle for me (although probably still going to end up as one star with the audience of this site...) and certainly not bad, but perhaps a bit too many tedious steps to my liking and not enough points in the solve where it either goes smoothly, or requires actually interesting logic. that's just how i feel about it though, i wouldn't be surprised if some solvers love that style of tedious slow progress.
4: a couple of very nice logical steps in there (if they were even intended and i didn't just invent interesting ways to get around doing basic sudoku...) but the rest was a bit too basic, easy and quick in comparison - almost more of a typing exercise than a puzzle. i found the harder steps very quickly and found it much easier than number 3, but for some solvers it would suddenly grind to a halt if they were breezing through the easy bits and didn't then spot the harder logic as quickly as i did. again, certainly not a bad puzzle, but i think some people would get a little annoyed if they just spent time doing very easy but somewhat time consuming typing in of numbers and then it suddenly got harder halfway through, only to then go back to being very easy after just two small harder and nicer steps. again: personal preference, nothing objectively wrong with it... just maybe something to keep in mind.

Overall, if you want to make puzzles of roughly the difficulty of numbers 3 and 4 here: I would say try to find a style in between those two. Not a constant tedious grind for finding singular pencilmarks leading to pairs/triples, but not a very easy typing exercise interrupted by just one or two harder steps either. I'm finding it hard to put this into words accurately, so maybe don't take it too literally... just pay attention to how the solve path feels: would it be fun to solve for a solver? or is the only reason you're having fun with it just because the idea of setting anything at all is giving you a rush?
Don't be discouraged though! I'm saying this harshly because you wanted it harshly, but I'll say again: well done setting your first few puzzles either way. Yes, sure it could be even better, but even as it is they are not at all bad, certainly for a beginner! I may have just listed everything about them i don't really like... but overall i actually did kinda like solving them. I would say just publish them anyway, together as a set like you did here if you need an excuse to include puzzle number 1 ... and see what other solvers think of them and have to say about it. reading comments on your puzzles is the only way to know what people think, after all.

This is exactly the type of reply I was looking for so thank you for that. I agree with pretty much everything you said. The goal was to make them progressively more difficult so maybe I've failed with that. Specifically with the 3rd and 4th puzzles, another goal was to give the solver a BOOST at the start to get things rolling then to have a little bit of harder solving involved then like a resolution towards the end. At the moment I just taking feedback as it comes and making adjustments to what I'm trying AND I'm ensuring that the puzzles have 1 solution only. 

On my first puzzle someone said to lessen the amount of variants that I use on easier puzzles, so that's why I attempted a thermometer set to keep things more simple. I'm glad that there were parts you did enjoy. To me, that's a step in the right direction for what I am trying to achieve. 

I have to say, the newer version of the German sum line THING, is WAY more thought out and I THINK, it has better logic and solves smoother - So I would love feedback on that one if you'd like to attempt it. 

What I had planned was to release these puzzles individually, BUT, have links to all of them in each description so that each puzzle has a chance to get individual feedback - I'm not sure if this is the correct thing to do. 

Thanks again for the detailed feedback, I'm looking forward to attempting to make more puzzles!

- To add to what I've said, I just gave them all a go and you are 100% right, 3 is harder than 4 and COULD be considered 2 stars... I'm not going to make changes to them. Having solved them with fresh eyes (and without just filling in numbers I remember), I'm pretty happy with how they go. They aren't the best, but they certainly aren't bad.