I have used most types of the different tool holders.
The adjustable boat type are as useful as a chocolate teapot, IMO.
4 way tool posts are reasonable but only if the shims, or most of them, are kept with each cutter – gluing together is good. Lantern types are likely almost as good if shims are treated the same. Making a a couple extra 4-way tool posts, ready for tool selection, is a cheap and easy option. I mostly only fitted two tools and one cutter or another is often a physical nuisance.
QCTPs are good, but overhang problems may exist, particularly where rigidity is already an issue.
The ‘budget’ version takes a little longer to change cutters, but the shims being replaced by a tool holder with position setting is a good improvement. For occasional tool changes they are a good product. I am currently using one as a rear tool post for an upside down parting tool.
Of the more common ones, piston/cam types are regarded as the cheaper/inferior brother to the wedge types, but are perfectly adequate for most hobbyists. Tool holder cost, or precision required for making/obtaining some tool holders, makes them a further expense above the cheaper piston types.
Lastly, the multi-position types look very impressive. Simple alteration of cutter angle is tempting, but getting quality at a reasonable cost is out of budget for most humble hobbyists.
My wife suggested a Chronos one for my last year’s birthday present, when she saw me evaluating them. I declined as the money could be better spent elsewhere with little loss, if any, to my turning capabilities by not having one. One thing I noted was the significantly higher cost of holders, or added difficulty in making one’s own! The other, was the possible questionable quality of a system from those origins. It would not be a case of ‘buy cheap, buy twice’, but buying expensive and buying twice (or not buying again)!