Ubuntu – Is it safe to switch from GRUB2 to BURG

I have Ubuntu 17.10 and Windows 10 installed in dual-boot (Non-UEFI) with GRUB2 as my default bootloader. It looks kinda old-fashioned boot-menu, I want a GUI boot-menu with a better look. I searched and found BURG as a suitable one, but I also seen warnings on the sites which say that if BURG gets corrupted, my PC would become unbootable.

Should I install the bootloader or not? Will it be safe? If not, isn't there any way to customise my GRUB2 to get a better look? I have installed GRUB Customizer but the changes I make doesn't seem to be working. Any suggestions?

UPDATE 1:

I've tried but sadly rEFInd doesn't work on my machine (or on any other machines with no UEFI OS). I've yet not tried BURG 'cause I'm not sure whether it'll work or not (moreover I have doubts that it may even corrupt the bootup configuration). Still I need help on the topic.

UPDATE 2:

Not getting any acceptable answer further, I finally decided to install BURG and test it but I can't install it. First I run this:

~$ sudo add-apt-repository ppa:n-muench/burg

PPA gets added to software sources successfully. Then I run update:

~$ sudo apt-get update

I get the following error:

...
...
Err:27 http://ppa.launchpad.net/n-muench/burg/ubuntu artful Release                                                                                   
  404  Not Found
...
...
Reading package lists... Done                                                                                                                         
E: The repository 'http://ppa.launchpad.net/n-muench/burg/ubuntu artful Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Now I can't even install BURG.

UPDATE 3:

I also tried to simply theme GRUB2, but again I can't do that also. I downloaded GRUB2 themes from here. After installing I run this GRUB update command:

sudo update-grub2

And I get following error (I just can't understand what it says):

Generating grub configuration file ...
/usr/sbin/grub-probe: error: failed to get canonical path of `/boot/grub/unicode.pf2GRUB_THEME=/boot/grub/themes/Vimix/theme.txt'.
No path or device is specified.
Usage: grub-probe [OPTION...] [OPTION]... [PATH|DEVICE]
Try 'grub-probe --help' or 'grub-probe --usage' for more information.

I can't also theme GRUB2. What to do now? Any help will be greatly appreciated. Thank you.