Love the color and shape of the balloon. The size and feel are absolutely amazing. It's definitely a must-have again. When I order more balloons, I will need to get some more of these balloons.

I always was a fan of Belbal balloons, but the 17" (B150) range beats everything else for me.
Like all taller balloons, it can take some skill to neck them, but by either blowing up the neck beforehand, or by strecthing the neck during blowing it can be done and can get quite impressive.
The balloons themselves easily make 17" without any problem, but some go quite beyond 17". 18" is quite easily achived, 19" takes some prep work (defalting and reinflating or extremely stretching the balloon beforehand - and crystals ones usually, see below). Beyond 19" the balloons tend to get to breaking point though, but maybe some more skilled looners can be them further.
I also got some crystal and glossy balloons (not through Nastila as the site doesn't have them (yet?)) so can compare. It's the same as with the 14" Belbals, really. The glossy ones tend to no inflate to the normal size and are losing air a bit quicker. The crystals are a bit stretchier and tend to a bigger easier.
Recommended!
I hope Nastila will stock the crystal and glossy ones too.
Belbal announced soap crystals for 2025 in their Christmas whishes, hope the B150 range will be included!