When we talk about design, we rather avoid the terms "beautiful" or "ugly" 'cause them are subjective. Something could be nice for someone and the same thing could be horrible to another one

Radical Design

If you start searching on internet differents reviews, the most repetitive concept is "radical design". The shaping of its chasis is unconventional. 
There is a technical way to mention this in designing, and this is called the MAYA umbral, and MAYA comes from the initials:

Most

Advanced 

Yet

Acceptable 

Or what the people is ready to buy for replace an item, being better than the old one... but not too much. In fact, when somebody buys a thing, mostly choose it thinking what his fellows will think about him. Yeah, quite confusing

Musk surely wanted a design for his car that calls anyone who want to be different. A form like a yell in a lonely and quiet place

Someone on the internet says "the Cybertruck looks every bit like a vehicle designed to shield its occupants from the outside world" and its sound logical since it is built with 10 layers of hard stainless steel, and the glasses are shockproof, despite it is wide known that the glasses get injured in the show up presentation (but I think it was on purpose, bad news calls more atention that good ones)

The branch of design that better fit with this truck is "minimalism" or the attempt to make the maximun with the minimun, and its bring to the whole vehicle. Even the interior look pretty austere, following the concept of smooth, flat, desert surfaces

The one who choose an electric car over the fosil propulsated ones, notwithstanding the price is higher, tells a lot of his priorities, and tesla uses this behaviour on a step beyond. This vehicle is saying "So, You wanna be defferent, you feel special, you want others surrounding you to realize that. I'm your car". And this appears to get the target, because pre-orders overpass 500k buyers 

Set up

The cybertruck configuration is attractive for who want a tough, heavy, powerfull, imposing vehicle, next is the set up of the cheaper version

My opinion

To conclude I´ll leave my comments with some quick renders of my own

As it seems a bare design, I could say It is not. Many says it comes out from the blade runner film, what is easy to remind, buy all the lines were projected  to conform a fortress with a rustic armony. Headlights are integrated showing respect with the design principle

I think the rear was left too massive, it has less design treatment than the rest. Perhaps a rib or some more angles could help to make it less invasive. 

The rule of the straight line goberns the vehicle, and as wheels must be round for the car function basic principle, the polygonal mudguards weren´t necessary.

What do you think? Would you buy it?

Thanks for reading and I apreciate a lot every commentary