I always wondered does any have bought it and if yes can tell me of those extra's are worth it?
Because i want a downlodeble version of the game and still think if i get the improved version or the gog version.

You mean the enhanced edition?

If you're not going to mod the game, the enhanced edition is much better.

If you're going to mod BG1 and get BG2 as well (both BG1+2 at GoG is just as expensive as just BG:Enhanced) then the version here at GoG is still much better. You get the entire BG saga and all mods are compatible.

The enhanced edition has decently working 3d acceleration support out of the box for AMD and nVidia cards. You can zoom in and out on the battlefield.
There aren't much mods that are compatible though. You don't really need the fix and tweak packs, but expansion like banter packs aren't compatible (yet), which is a big minus in my book.
There are also still a lot of bugs to be ironed out of the Enhanced edtion that weren't in the original.
The extra's aren't worth it at all. It's a nice addition, but a modded original offers so much more than a few mediocre characters.

When more mods are compatible with the enhanced edition, it could be considered better, but as it stands, the versions here on GoG are the better buy imho. This might change in the future, but it's still a long way off.

One thing to remember.. BGEE can run on iPad. Which might be a new kind of experience all over again. BUT, certainly you can't mod iPad version.

Well i ended up buying the gog version since it was very cheap and have downloaded tutu, the big world mod i dont know how to install.

I certainly wouldn't call the new characters "mediocre".

They have great voicesets with much more interaction than any of the other NPC's in the game. Hell, at the very least they are on par with the others.

The enhanced version honestly sucks. At least for hardcore old-timers. There are many
cinematics that were cut-off, like the resting outside/resting at inns. Others, got their
animation removed, thus loosing motion and gore (like sarevok murdering one of the
bhaalspawn in the beginning). They were practically cartoonified. More xp, which means some
additional level ups (depending on your class' xp progression). All classes from BG2 got in
the first enhanced edition of BG1, with the addition of 3 arguably useless npcs, and a new kit,
the blackguard. Some bug corrections, still not enough, a lot of NEW BUGS, see certain forums
for details, some restored content that was locked up/abandoned before original release,
and of course, ability to play in modern systems with little trouble.

Here in GoG you can buy the originals. Tweaked for better performance and compatibility with
modern systems ALREADY. Plus, in our wondrous site, there is also a description for choosing
and istalling mods, to manually alter your bought games into a merged form, similar in many
things to the Enhanced Edition. If you are a D&D fan, a gamer who enjoys the original experience
over the crappy-but flashy remake, you hate overpowering gameplay to the point of ridicule
(like the new spells and class kits of BG2 being incorporated in BG1), and you want to reward the
site of GoG for all their hard work and dedication to us, you will want to buy the originals listed
here.

Why the originals are better? Because they are more polished, some of their errors and bugs work
towards your own benefit if you exploit them, their artwork is better (despite the EE came out
recently), they are more balanced, xp is as much as you will need (AD&D rules are as they should
be, and you can even lower or make them more difficult), the data that was ommited is nothing
special or big, and last but not least, importing to 2 a character after a 1 playthrough, you still can
choose an appropriate kit for that class, dual etc. You can even use the multiplayer to create
and manipulate and entire party of your own creation, and some claim that being exploited
results into item transfers for your main from 1 to 2!