I've been a Bosch fan for a couple of decades based on ownership of a
made in Switzerland Hammer Drill and a
1587AVS Jig Saw. Both are still in regular use. My first dive into the 18V world was a gen 1 Freak. Awesome tool! I've now gone pretty deep in the Bosch 18V pool, to the point of importing a European market track saw. No regrets on any of the purchases. I do admit the ranges offered by Red, Teal, Yellow (and others) leaves me wishing for more, but I have everything I
need, and most of what I
want.
I have a decent assortment of tailed Bosch tools too, but I'm a diehard convert to the cordless environment now - they simply perform great and bring massive convenience. I have toyed with adding a second platform (Red or Teal) for a few items I can't get in the Blue flavor, but not been serious about it.
The latest in m y stable is a hand-crushing torque monster
GSB18V-755C. Much like a performance car or motorcycle, this thing has an excellent power to weight ratio. It gets the job done on a 2.0Ah, runs long on a Core 4.0Ah, and is a monster with a Core 6.3Ah (but no longer light weight).
If you've got the basics covered, check out the
GOP18V-28N Multi Tool , it is so smooth (soft start helps) and so powerful. It reminds me of an old Juki or sailrite sewing machine. Note that it runs Starlock Plus blades so consider that if you do take the plunge...
I have a mix of batteries of varying age and Ah, so I'm never without juice. The backwards, and claimed, forward compatibility is also a nice change of pace. I've used many of the tools back to back with their Red & Teal counterparts, and my opinion is that certain tools just
feel better than others, but I wouldn't say one brand is significantly better or worse than the others mentioned. That horse died eons ago here on Garage Journal, and is still often beaten.
In general, I would characterize the Bosch 18V line as a Premium product, but not a Super Premium - Festool, Mafell, Fein. I can't comment on warranty support as I've never needed to use it with cordless or tailed.
I can, based on a fair margin of personal use, highly recommend Bosch 18V.