Nice Djordje
My mates all fish the Shakey, first thing I was in was a Sparton and I hate both. If they were all that was available then I simply would not have a tube.
I think even Kev may be coming around to the fact that the Guideline is a far better bit of kit. Only downside is that a few bits of it are not particularly well made. The D rings for the carry straps have all snapped, I've replaced them with carabiners which are easier to use anyway. I had the stitching pull in a seam, easily fixed but I'd not expect to have to. Other thing to consider would be that it has a greater surface area than some other tubes which means you get more of a sail effect when carrying it in a wind, also weighs about 2lb more than Shakey but a month off the pies would negate that.
Infinitely adjustable ride position, very stable, easy to move around and it DOES NOT get blown about or flip over in a big wave due to sitting higher not have I ever slipped out of the front of it and drowned.
I can outrun any other tube I've been up against with my standard fins (now sponsored by Gaffa Tape) even though the other drivers may be using top of the range turbo force frog flipper specials or WTF ever they are. I don't get cold, have storage space etc....... I could go on!
Get one Iain, some mug will pay a good price for your blue & red bidet, if you want a shot of mine for a day just ask.
Cheers
Ben